Key size is the size measured in bits of the key used in a cryptographic algorithm.
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4answers
5k views
What are the practical difference between 256-bit, 192-bit, and 128-bit AES encryption?
AES has several different variants (AES-128, AES-192, AES-256), but why would I use one over another?
16
votes
3answers
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How big an RSA key is considered secure today?
I think 1024 bit RSA keys were considered secure ~5 years ago, but I assume that's not true anymore. Can 2048 or 4096 keys still be relied upon, or have we gained too much computing power in the ...
2
votes
1answer
303 views
How were the AES key and block length subsets of Rijndael selected?
My intuition tells me it's a trade off between speed and security, but how did the standardisation process select these three seemingly arbitrary key lengths (namely, AES-128, AES-192, AES-256).
2
votes
1answer
193 views
Padding for the TEA
Sorry if this is a noob questions, but I finally figured out how to implement the Tiny Encryption Algorithm in C++.
My question is what to do about padding the key and the plaintext? I know that ...
1
vote
2answers
137 views
AES Key Length vs Block Length
This answer points out that certain key and block lengths were a requirement for the AES submissions:
The candidate algorithm shall be capable of supporting key-block combinations with sizes of ...
