Tag Info

Hot answers tagged

7

Both an AES-128 key (as defined by FIPS 197), and a TDES Keying Option 2 key (as defined by FIPS SP-800-67) are 128-bit bitstrings. Similarly, both an AES-192 key and a TDES Keying Option 1 key are 192-bit bitstrings. The differences are: In AES, all bits of a key matter to the result; in TDES, 1 bit out of 8 (the lower-order bit of each byte in ...


2

There are some differences between the keys of AES and 3DES. However I do think that your colleagues are more interested in the security of the primitive itself. The AES block cipher is rather more secure than triple DES. If a 128 bit triple DES key is created the amount of effective key bits - the bits actually used in the protocol - is 112 bits. This is ...


2

None of Twofish, Serpent and AES are currently known as broken, so as far as security is concerned, you can use any of them. AES has a slight advantage because it's very widely used, so if it gets broken you're more likely to hear about it and get relevant software updates quickly. The Snowden postings haven't changed much as far as cryptography usage is ...


1

Initialization Key hash function hashstring Configuration: E is Rijndael with a block size and key size of 256 bits Input: keystring Output: hash The keystring is padded up with bytes valued zero and split up in blocks of 256 bits $S_0$ to $S_n$; The key blocks $K_0$ to $K_n$ are generated, where $K_0$ consist of $S_0$. The following blocks - if any, ...



Only top voted, non community-wiki answers of a minimum length are eligible