|
I know that with brute force there are 2^56 possible keys to check (56 bits, each either a 1 or 0). But let's say I know the message itself is only made up of letters (a-z, A-Z). Would knowing things (like the limitation to just letters) about the plaintext make breaking the encryption easier? | |||
|
feedback
|
|
The answer is a vague YES, as this depends on the encryption algorithm. This is usually also a function of the number of cipher and plain-text messages available (in most cases the more such available, the easier it is to break the code). This is the reason that 56-bits is today counted as very weak protection, especially in view of the computing-power available to government organizations. For the RSA method quoted by bbaja42, see RSA Algorithm section "Weaknesses in RSA", as well as Cracking RSA and RSA: Hacking and Cracking. | |||
|
feedback
|
