3 votes

Double- and -add algorithm

The points of an elliptic curve forms an abelian group under the usual point addition. In finite field case, the order is finite, i.e. the curve has finite number of points. The order can be prime or ...
Titanlord's user avatar
  • 2,120
3 votes

Does combining a stream cipher and block cipher produce any vulnerabilities?

With respect to confidentiality, cascading two ciphers (xChacha20 then AES-CBC in the question) with independent keys is at least as secure as either cipher against KPA and CPA attacks. That's ...
fgrieu's user avatar
  • 138k
1 vote
Accepted

How to evaluate the minimum complexity of the key recovery when the success probability p is given?

For common cryptographic algorithms, there is no known lower bound to the complexity of key recovery with a given (and sizable) probability. We can't mathematically exclude the possibility of a much ...
fgrieu's user avatar
  • 138k
1 vote

Does higher key sizes correspond to a higher security parameter?

This can be either a philosophical question or a empirical question, but answer to both these sides can be similar. First, the title is correct, higher key sizes corresponds to a higher security level....
DannyNiu's user avatar
  • 9,001

Only top scored, non community-wiki answers of a minimum length are eligible