[cryptography] good key stretching practice?
Hello list. What is the best key stretching method that can be used? -- Kevin ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] good key stretching practice?
Check out PBKDF2. http://en.wikipedia.org/wiki/PBKDF2 Good table if you're not satisfied: http://crypto.stackexchange.com/questions/6697/bcrypt-vs-key-stretching-md5 On Sat, Dec 28, 2013 at 10:01 PM, Kevin kevinsisco61...@gmail.com wrote: Hello list. What is the best key stretching method that can be used? -- Kevin ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] good key stretching practice?
On Dec 28, 2013, at 2:01 PM, Kevin kevinsisco61...@gmail.com wrote: Hello list. What is the best key stretching method that can be used? Best for what? If you are trying to stretch from a password to a key and wish to add some resistance to password cracking then currently your “mainstream” choices are scrypt, PBKDF2, and bcrypt. None of those are perfect, but each will do. PBKDF2 is the best established, but it is also the most quirky. If you want to play at the bleeding edge of this, you can look what has been proposed as part of the Password Hashing Competition. https://password-hashing.net If you don’t need a “slow” hash, then perhaps something like HKDF is right for your particular needs. http://tools.ietf.org/html/rfc5869 But without having a better sense of what you are trying to achieve, nobody can be confident that they are recommending the right thing to you. Cheers, -j signature.asc Description: Message signed with OpenPGP using GPGMail ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] good key stretching practice?
Hi everyone, I don't want to waste your time but I'd love to learn some more about cryptography, I was recommended this mailing list but its aimed well above my standard. I'm based in the UK 17 years old and to be pointed in the direction of some good resources would be great, I've watched a lot of the YouTube stuff but would like a step up from there. Hopefully I'll join you again one day ;) Thanks in advance. Ross On 28 Dec 2013, at 09:01 PM, Kevin kevinsisco61...@gmail.com wrote: Hello list. What is the best key stretching method that can be used? -- Kevin ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] good key stretching practice?
On 12/28/2013 6:02 PM, Jeffrey Goldberg wrote: On Dec 28, 2013, at 2:01 PM, Kevin kevinsisco61...@gmail.com wrote: Hello list. What is the best key stretching method that can be used? Best for what? If you are trying to stretch from a password to a key and wish to add some resistance to password cracking then currently your “mainstream” choices are scrypt, PBKDF2, and bcrypt. None of those are perfect, but each will do. PBKDF2 is the best established, but it is also the most quirky. If you want to play at the bleeding edge of this, you can look what has been proposed as part of the Password Hashing Competition. https://password-hashing.net If you don’t need a “slow” hash, then perhaps something like HKDF is right for your particular needs. http://tools.ietf.org/html/rfc5869 But without having a better sense of what you are trying to achieve, nobody can be confident that they are recommending the right thing to you. Cheers, -j That link actually helped me. Thanks. -- Kevin ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] good key stretching practice?
On 12/28/2013 6:35 PM, RossMcFarlane wrote: Hi everyone, I don't want to waste your time but I'd love to learn some more about cryptography, I was recommended this mailing list but its aimed well above my standard. I'm based in the UK 17 years old and to be pointed in the direction of some good resources would be great, I've watched a lot of the YouTube stuff but would like a step up from there. Hopefully I'll join you again one day ;) Thanks in advance. Ross On 28 Dec 2013, at 09:01 PM, Kevin kevinsisco61...@gmail.com wrote: Hello list. What is the best key stretching method that can be used? -- Kevin ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography Please don't highjack topics. It really tends to give a bad impression. We are all happy to help but you can start your own thread. -- Kevin ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
[cryptography] beginner crypto
On 29/12/13 02:35 AM, RossMcFarlane wrote: Hi everyone, I don't want to waste your time but I'd love to learn some more about cryptography, I was recommended this mailing list but its aimed well above my standard. Yes, this is about crotchety old war armchair cryptographers fighting decades-old battles. So etiquette helps, but which one is a secret. I'm based in the UK 17 years old and to be pointed in the direction of some good resources would be great, I've watched a lot of the YouTube stuff but would like a step up from there. Question 1; are you interested in maths or in programming? Your survival probability increases if it is only one. If in programming, what language? What you probably would fine easiest would be to read the wikipedia pages on block ciphers. Then search for an algorithm and try and get it going. There was once an algorithm called Tiny which was quite nice. If in maths, others can comment. iang Hopefully I'll join you again one day ;) Thanks in advance. Ross ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
