On 10/06/11 3:14 AM, Paul Hoffman wrote:
Greetings again. I am helping someone design a system that will involve giving
someone a randomly-generated key that they have to type in order to unlock data
that is private but not terribly valuable. Thus, we want to keep the key as
short as practical to reduce typing and mis-typing, but long enough to prevent
trivial brute-force attacks. The encryption will be AES-128 in CBC mode.
What is the current state of brute-force attacks on AES-128 blobs? Are there
recent results where we can estimate the cost of brute-forcing 64-bit and
80-bit keys?
Not quite what you are asking for, but you could poke around here:
http://www.keylength.com/en/3/
iang
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