Ask HN: Why isn't there an AES512 or AES1024

4 points by vicpara 9y ago ↗ HN

Yes, I know AES/Rijndael is a symmetrical encryption algorithm that somehow became the winner of a competition NSA had a lot of strings to pull. In the same time it is considered relatively secure for most application. Our hard drives are most likely encrypted with AES128. For super military+ grade why isn't there an AES512 or 1024 ?

2 comments

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bengunnink 9y ago ↗

https://crypto.stackexchange.com/questions/20253/why-we-cant...

andreareina 9y ago ↗

It's infeasible to brute-force a 256-bit key[1]. Where cryptanalysis lowers the size of the job enough that it's feasible, the answer isn't to have a bigger key, it's to have a better algorithm.

[1] https://www.schneier.com/blog/archives/2009/09/the_doghouse_...