For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. Yes and it’s the bitwarden extension client that is failing here. On a sidenote, the Bitwarden 2023. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Or it could just be a low end phone and then you should make your password as strong as possible. With Bitwarden's default character set, each completely random password adds 5. Therefore, a rogue server could send a reply for. That seems like old advice when retail computers and old phones couldn’t handle high KDF. However, you can still manually increase your own iterations now up to 2M. The user probably wouldn’t even notice. It has also changed. Now it works! Seems to be a bug between the BitWarden extension and a Vault that has 100000 KDF iterations. It's set to 100100. Argon2 (t=10, m=512MB, p=4) - 486. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. log file is updated only after a successful login. json file (storing the copy in any. We recommend a value of 600,000 or more. The recent LastPass breach has put a lot of focus on the number of PBKDF2 hash iterations used to derive the decryption key for the password vault. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). ), creating a persistent vault backup requires you to periodically create copies of the data. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Vaultwarden works! More data, on the desktop I downgraded the extension for FF to 2022. The back end applies another 1,000,000. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. One component which gained a lot of attention was the password iterations count. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Increasing iterations from the default 64 MB may result in errors while unlocking the vault with autofill. ddejohn: but on logging in again in Chrome. app:web-vault, cloud-default, app:all. A setting of KDF algorithm: Argon2id - KDF iterations: 8 - KDF memory (MB): 96 - KDF parallelism: 6 has always worked thus far. Because the contents of this file are expunged if you ever log out (which can happen unexpectedly, if your session expires, if you change your master password or KDF iterations, if Bitwarden resets their servers, etc. Exploring applying this as the minimum KDF to all users. "The default iteration count used with PBKDF2 is 100,001 iterations on the client (client-side iteration count is configurable from your account settings), and then an additional. On a PC or a high end cell phone, you can easily set the iterations well above 1,000,000 and only notice a 1-2 second delay. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. So I go to log in and it says my password is incorrect. grb January 26, 2023, 3:43am 17. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Thus; 50 + log2 (5000) = 62. Therefore, a rogue server could send a reply for. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Unless there is a threat model under which this could actually be used to break any part of the security. Another KDF that limits the amount of scalability through a large internal state is scrypt. log file is updated only after a successful login. Bitwarden is abiding by these new recommendations, and when you log into the Bitwarden web app you may see a message saying your KDF Iterations setting is too low. Hi all, Attempting to update the KDF iteration number as suggested and saw it stated that “You will need to log back in and complete two-step login setup. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. 10. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. When you change the iteration count, you'll be logged out of all clients. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. This article describes how to unlock Bitwarden with biometrics and. Unless there is a threat model under which this could actually be used to break any part of the security. 2 Likes. Therefore, a rogue server could send a reply for. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on devices with slower CPUs. If you want to avoid feelings of inadequacy when Bitwarden ups the default iterations to 600,000 in a month or two, you can go ahead and increase your KDF iteration value to 600k. Now it works! Seems to be a bug between the BitWarden extension and a Vault that has 100000 KDF iterations. The user probably wouldn’t even notice. 12. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Feel free to resume discussion on Github: Discussions · bitwarden/server · GitHub Discussions · bitwarden/clients · GitHub Discussions · bitwarden/mobile · GitHubI think the . This setting is part of the encryption. Hi, I currently host Vaultwarden version 2022. Security expert, Dmitry Chestnykh, had mentioned this problem in 2020 , yet it still remains unresolved. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. app:web-vault, cloud-default, app:all. In src/db/models/user. Set minimum KDF iteration count to 300. I have created basic scrypt support for Bitwarden. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. I have created basic scrypt support for Bitwarden. Change the ** KDF iterations** to 600000 (Six Hundred Thousand) or higher! Keep in mind that this doesn't do you much good however if you have a weak master password. The point of argon2 is to make low entropy master passwords hard to crack. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. Security expert, Dmitry Chestnykh, had mentioned this problem in 2020 , yet it still remains unresolved. ddejohn: but on logging in again in Chrome. log file is updated only after a successful login. The client has to rely on the server to tell it the correct value, and as long as low settings like 5,000 iterations are supported this issue will remain. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. Whats_Next June 11, 2023, 2:17pm 1. After changing that it logged me off everywhere. With the warning of ### WARNING. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. I think the . (for a single 32 bit entropy password). Among other. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Can anybody maybe screenshot (if. Question: is the encrypted export where you create your own password locked to only. feature/argon2-kdf. The feature will be opt-in, and should be available on the same page as the password iteration settings in Bitwarden's web vault. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Following the May update, our end users will be prompted that their KDF iterations are not at the recommended 600,000. Anyways, always increase memory first and iterations second as recommended in the argon2. I think the . This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). log file is updated only after a successful login. For scrypt we could get by, by setting the work factor N (which influences both computation and memory) and store this in the KDF Iterations (although ideally a user could configure the other parameters too). In contrast, increasing the length of your master password increases the. Also make sure this is done automatically through client/website for existing users (after they. With the warning of ### WARNING. Bitwarden Community Forums Master pass stopped working after increasing KDF. It's set to 100100. My account was set to 100000 by default!! To change it log into your WebUI and go to Account > Security > Keys. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Ask the Community. The point of argon2 is to make low entropy master passwords hard to crack. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. GitHub - quexten/clients at feature/argon2-kdf. Increasing KDF iterations will increase running time linearly. The user probably wouldn’t even notice. So if original entropy (of passphrase) with 2 iteration = +1 (effective) entropy. The user probably wouldn’t even notice. (The key itself is encrypted with a second key, and that key is password-based. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Changed my master password into a four random word passphrase. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Bitwarden 2023. 1 Like mgibson (Matt Gibson) January 4, 2023, 4:57pm 6 It is indeed condition 2. We recommend that you increase the value in increments of 100,000 and then test all of your devices. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. Therefore, a. log file is updated only after a successful login. Exploring applying this as the minimum KDF to all users. app:web-vault, cloud-default, app:all. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. log file is updated only after a successful login. Scroll further down the page till you see Password Iterations. 2 Likes. The user probably wouldn’t even notice. OK, so now your Master Password works again?. Unless there is a threat model under which this could actually be used to break any part of the security. Unless there is a threat model under which this could actually be used to break any part of the security. More specifically Argon2id. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. pub const CLIENT_KDF_ITER_DEFAULT: i32 = 5_000; Was wondering if there was a reason its set so low by default, and if it shouldn't be 100,000 like Bitwarden now uses for their default? Or possibly a configurable option like how PASSWORD_ITERATIONS is. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on devices with slower CPUs. If you want to avoid feelings of inadequacy when Bitwarden ups the default iterations to 600,000 in a month or two, you can go ahead and increase your KDF iteration value to 600k. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. We recommend a value of 600,000 or more. Hacker NewsThe title of the report is: "KDF max iterations is [sic] too low", hence why I asked what you felt a better max number would be, so if the issue is the min number, that's different. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). The higher the memory used by the algorithm, the more expensive it is for an attacker to crack your hash. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. I went into my web vault and changed it to 1 million (simply added 0). I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Among other. Exploring applying this as the minimum KDF to all users. iOS limits app memory for autofill. Hey @l0rdraiden see earlier comments, including Encryption suggestions (including Argon2) - #24 by cscharf for more information. Where I agree with the sentiment is when users panicked because they realized that Bitwarden hadn't immediately updated the default KDF iterations from 100k to 310k when OWASP changed their recommendations in 2021, and weren't automatically updating existing users' KDF configurations when the recommendation increased to 600k earlier. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. I went into my web vault and changed it to 1 million (simply added 0). Unless there is a threat model under which this could actually be used to break. Enter your Master password and select the KDF algorithm and the KDF iterations. Hey @Quexten we’re switching over to Github discussions to keep the PR chats closer to the code. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. Then edit Line 481 of the HTML file — change the third argument. I didn’t realize it was available as I had been looking in the extension and desktop apps, not realizing a different option existed in the web vault. htt. On the cli, argon2 bindings are. Feature function Allows admins to configure their organizations to comply with change in recommendations over time (as hash compute capabilities increase, so does the need for increasing KDF iterations). Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Yes, you can increase time cost (iterations) here too. Ask the Community. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations value? grb January 26, 2023, 3:43am 17. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Can anybody maybe screenshot (if. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Due to the recent news with LastPass I decided to update the KDF iterations. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. In the thread that you linked, the issue was that OP was running third-party server software that is not a Bitwarden product, and attempting to use a Bitwarden client app to log in to their self-hosted server that was running incompatible software. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Exploring applying this as the minimum KDF to all users. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. After changing that it logged me off everywhere. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. The try it again with Argon2id, using the minimum settings for memory (16 MiB) and iterations (2. The user probably. Therefore, a rogue server could send a reply for. Palant said this flaw meant that the security level of Bitwarden is identical to what LastPass had. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations value? grb January 26, 2023, 3:43am 17. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). The point of argon2 is to make low entropy master passwords hard to crack. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Also, check out this Help article on Low KDF Iterations: and the KDF Iteration FAQ:. If the KDF iteration count is set too high, some devices may fail to complete the PBKDF2-HMAC-SHA256 calculation because of insufficient computing power — this is more likely to occur on mobile devices and older hardware. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. LastPass got in some hot water for their default iterations setting bein… My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. 1. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Argon2 KDF Support. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. I think the . The feature will be opt-in, and should be available on the same page as the. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. It will cause the pop-up to scroll down slightly. in contrast time required increases exponentially. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. Because the contents of this file are expunged if you ever log out (which can happen unexpectedly, if your session expires, if you change your master password or KDF iterations, if Bitwarden resets their servers, etc. I appreciate all your help. Bitwarden Community Forums Argon2 KDF Support. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Higher KDF iterations can help protect your master password from being brute forced by an attacker. LastPass uses the standard PBKDF2 (Password-Based Key Derivation Function 2). Additionally, there are some other configurable factors for scrypt, which. I guess I’m out of luck. Bitwarden has never crashed, none. On the typescript-based platforms, argon2-browser with WASM is used. This article describes how to unlock Bitwarden with biometrics and. We recommend a value of 600,000 or more. Bitwarden Community Forums. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Any idea when this will go live?. Exploring applying this as the minimum KDF to all users. Set the KDF iterations box to 600000. My recommendation is to try to increase the KDF size (by 50k or 100k at a time) and then test it on all the devices you use Bitwarden on by logging out of the page/app and then log back. On mobile, I just looked for the C# argon2 implementation with the most stars. ” From information found on Keypass that tell me IOS requires low settings. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Click on the box, and change the value to 600000. Exploring applying this as the minimum KDF to all users. The user probably wouldn’t even notice. This article describes how to unlock Bitwarden with biometrics and. Anyways, always increase memory first and iterations second as recommended in the argon2 paper and iterations only afterwards. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Among other. If a user has a device that does not work well with Argon2 they can use PBKDF2. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. The user probably wouldn’t even notice. Can anybody maybe screenshot (if. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. 5s to 3s delay or practical limit. Honestly, the entire vault is heavily encrypted and the encryption key is your master pass, the ability for a hacker or somebody to decrypt your vault would be nearly impossible especially if you have BitWarden setup with all the proper security settings like 2FA and high enough KDF Iterations to prevent brute force. I have created basic scrypt support for Bitwarden. 0 release, Bitwarden increased the default number of KDF iterations for accounts using the PBKDF2 algorithm to 600,000, in accordance with. On the typescript-based platforms, argon2-browser with WASM is used. ago. That seems like old advice when retail computers and old phones couldn’t handle high KDF. anjhdtr January 14, 2023, 12:03am 12. Then edit Line 481 of the HTML file — change the third argument. The client has to rely on the server to tell it the correct value, and as long as low settings like 5,000 iterations are supported this issue will remain. We recommend a value of 600,000 or more. Also notes in Mastodon thread they are working on Argon2 support. In src/db/models/user. 1 was failing on the desktop. Exploring applying this as the minimum KDF to all users. 10. Bitwarden also uses the PBKDF2 KDF, but as of this writing, with a more secure minimum of 600,000 iterations. Exploring applying this as the minimum KDF to all users. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. the threat actors got into the lastpass system by. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. 2 million USD. For which i also just created a PR #3163, which will update the server-side to at least 350_000 iterations instead of 100_000. Higher KDF iterations can help protect your master password from being brute forced by an attacker. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. From this users perspective, it takes too long for this one step when KDF iterations is set to 56. Feb 4, 2023. However, the format and encryption algorithm are open source, and there are third-party tools that can decrypt these files (e. KDF iterations:5 KDF memory (MB):128 KDF concurrency 4 - it’s bearable here, login takes less than 3 seconds. Ask the Community. As for me I only use Bitwardon on my desktop. Yes and it’s the bitwarden extension client that is failing here. 2FA was already enabled. You should switch to Argon2. Amongst other weak points in the attack, LastPass was found to have set the iterations to a low count, which is considered an insecure practice. 9,603. We recommend a value of 600,000 or more. app:all, self-hosting. If that is not insanely low compared to the default then wow. Do beware, Bitwarden puts a limit of 10 iteration rounds because in QA testing, it was unlimited, which lead to a tester having a 30 minute unlock time (1k+ iterations at 1GiB memory). This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. The user probably wouldn’t even notice. ## Code changes - manifestv3. Kyle managed to get the iOS build working now,. Now it works! Seems to be a bug between the BitWarden extension and a Vault that has 100000 KDF iterations. 6. Among other. log file is updated only after a successful login. Then edit Line 481 of the HTML file — change the third argument. Password Manager. Aug 17, 2014. 5 million USD. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. Exploring applying this as the minimum KDF to all users. One of the Hacker News commenters suggestions which sounds reasonable is to upgrade the user to the current default KDF iterations upon a change of the master password. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Question about KDF Iterations. alfonsojon (Jonathan Alfonso) May 4, 2023, 2:46pm 1. all new threads here are locked, but replies will still function for the time being. 4. Exploring applying this as the minimum KDF to all users. I just set it to 2000000 (2 million) which is the max that bitwarden currently allows (Dec 27th 2022) login times: pixel 6 : ~5 seconds lenovo Thinkpad P1 gen 3 (manufactured/assembled 11/16/2020) with Intel(R) Core(TM) i7-10875H 8/16 HT core : ~5 secondsThe server limits the max kdf iterations (even for the current kdf) to an insecure/low value. If all of your devices can handle it (looking at you, Android), you could just bump up to 2,000,000 and be done second-guessing yourself. So, I changed it by 100000 as suggested in the “Encryption key settings” warning. ”. If your passphrase has fewer than 6 words, then the password entropy and KDF work together to secure your vault. json file (storing the copy in any. One thing I would like an opinion on: the current PBKDF only needs an Iteration count, and sends this via tha API / stores it. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. 2. With the warning of ### WARNING. Among other. The point of argon2 is to make low entropy master passwords hard to crack. 5. After changing that it logged me off everywhere. The client has to rely on the server to tell it the correct value, and as long as low settings like 5,000 iterations are supported this issue will remain. I don’t think this replaces an. The user probably wouldn’t even notice. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. While you are at it, you may want to consider changing the KDF algorithm to Argon2id. Onto the Tab for “Keys”. I don’t think this replaces an. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Iterations (i) = . Low KDF iterations. Security. Higher KDF iterations can help protect your master password from being brute forced by an attacker. We recommend that you. According to comments posted by Quexten at Bitwarden's community forums, the company has a 5-week release cycle, so we could expect Argon2 support to be added next month on all platforms if the tests are successful. The user probably wouldn’t even notice. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Exploring applying this as the minimum KDF to all users. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. With the warning of ### WARNING. Can anybody maybe screenshot (if. Feature name Provide a way for an admin to configure the number of minimum KDF iterations for users within an organization. This strengthens vault encryption against hackers armed with increasingly powerful devices. If changing your iteration count triggers a re-encryption, then your encryption key is derived from your password. Our default is 100,000 iterations, the Min allows for higher performance at the user's discretion but the key length combined with the password still makes this. My account was set to 100000 by default!! To change it log into your WebUI and go to Account > Security > Keys. 9,603. 833 bits of. Exploring applying this as the minimum KDF to all users. Unless there is a threat model under which this could actually be used to break any part of the security. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. json: csp should be "extension page*s*", and add wasm-unsafe-eval so we can load the wasm. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Then edit Line 481 of the HTML file — change the third argument. Changing the env var PASSWORD_ITERATIONS does not change the password_iterations value in the DB,. RE: Increasing KDF Iterations… Are there any inherent problems caused by increasing KDF iterations? That is, any risk of losing data, etc. For scrypt we could get by, by setting the work factor N (which influences both computation and memory) and store this in the KDF Iterations (although ideally a user could configure the other parameters too). Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters).