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Aug
13
comment How are the AES S-Boxes calculated?
I think I got it. It was, actually, trivial. ;-)
Aug
12
comment Cryptographic random numbers for key generation
@RichieFrame thank you. If you could post a link in a comment I would be glad. Thanks a lot in advance.
Aug
11
comment Cryptographic random numbers for key generation
@RichieFrame very interesting. is your wrapper for your private use or free to use?
Aug
11
comment How are the AES S-Boxes calculated?
I understand how this works but I cannot understand why the algorithm presented in the wikipedia (en.wikipedia.org/wiki/Rijndael_S-box#Forward_S-box) page is equivalent.
Aug
5
comment AES storing the length within the encrypted data versus storing it outside
oh, yes, sorry. Thanks for the correction @MaartenBodewes !
Aug
4
comment AES storing the length within the encrypted data versus storing it outside
you usually do not need to add the message lenght. following a precise standard, add and remove padding is possible in one and one only way. PKCS#5 padding, for example, always prescribes adding one block of bytes, potentially all set to zero, to tell the algorithm that it does in fact have all of the blocks that were transmitted.
Aug
4
revised LUKS multiple key slots - what's the intuition?
add "disk-encryption" tag
Aug
4
suggested approved edit on LUKS multiple key slots - what's the intuition?
Aug
4
revised LUKS multiple key slots - what's the intuition?
change image link.
Jul
27
comment Factorize RSA knowing several N and E
There's a good piece of software at factorable.net that can compute the GCD of several couples of integers at the same time
Jul
27
comment Can you explain Bleichenbacher's CCA attack on PKCS#1 v1.5?
A new link for the original paper archiv.infsec.ethz.ch/education/fs08/secsem/… (link in the answer gives a 404error)
Jul
25
awarded  Yearling
Jun
25
awarded  Caucus
Jun
25
awarded  Constituent
May
28
comment How to decrypt a PGP message with only the two primes and the public exponent?
You can use a python library to build up your key from the information you have.
May
27
comment Why don’t all AES encryption tools produce the same key from the same password?
You missed a point. AES is a standard. Encryption is not defined with a password but with a key. So you must derive a key from you password. Give a look PBKDF.
May
27
comment Why don’t all AES encryption tools produce the same key from the same password?
Encryption should not be deterministic. There is also a random value, called initialization vector (IV) that is used to randomize the output. It is added to the ciphertext and it is used during the decryption process too. For this reason using different software (but even encrypting twice under the same software) you get different ciphertexts. By the way if the algorithm and the mode are correctly implemented, no matter what software Bob is using, he will definitely decrypt Alice's message.
May
27
comment Why don’t all AES encryption tools produce the same key from the same password?
this question looks like a homework question. Do you want we do it for you?
May
11
comment ECC vs RSA: how to compare key sizes?
you can find something here (3 links): gnupg.org/faq/gnupg-faq.html#no_default_of_rsa4096 certsimple.com/blog/measuring-ssl-rsa-keys crypto.stackexchange.com/questions/8687/…
Mar
3
comment AES as Integer Program
If I am correct, every symmetric algorithm can be described by a system. The problem is the whole system is too much big to be solved.