Tag Info

New answers tagged

4

I know that some of them are pretty hard to crack, but since they are so commonly known is it even practical to consider using something like that as an encryption method considering the algorithms for encryption and decryption are commonly known (from a security perspective)? In fact, this is exactly what we want. Schneier's law Anyone, from the ...


2

Yes, there are modes of operation that achieve the property that you are describing. For example, the Propagating Cipher Block Chaining (PCBC) mode of operation: This mode is similar to CBC but the output for each block is propagated to the input of the next one, so a small error will propagate indefinitely, both for encryption and decryption. There may ...


2

Block ciphers map bit strings of fixed length to other bit strings of the same length. Hence, using only the block cipher primitive, you can't encrypt more than one block (typically 16 bytes), which is of course undesirable. The straight-forward (but bad!) way around this limitation would be to split up the message into chunks of block length and ...


2

No, the IGE encryption cannot be parallelized. Also the decryption of IGE/ABC is serial. The input to the block cipher for encryption is the ciphertext of the previous block xor'd with the plaintext (and the result is then xor'd with the previous block plaintext). For decryption, you have to XOR the ciphertext with the plaintext of the previous block ...



Top 50 recent answers are included