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20h
comment Types of Cryptography for a 4-8 bit microcontroller
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20h
reviewed Close Secure(delegated, outsourced) computation
20h
reviewed Close What is the difference between IND-CCA2 and NM-CCA2? And how does one imply another?
20h
comment What is the difference between IND-CCA2 and NM-CCA2? And how does one imply another?
What research have you done? Do you understand the difference between security notions? In its current state, the question lacks effort and information.
20h
reviewed Close A proof exercise in the <<Intrduction To Modern Cryptography>>
20h
reviewed Close Using Diffie-Hellman key to establish a shared key $K_{AB}$
20h
reviewed Close RSA-Like encryption for embedded systems
20h
reviewed Close Decrypt with only the cipher file and the key?
21h
reviewed Close Meaning of Multiplicative Group to the power n i.e. Z^n
21h
reviewed Close Should I use a key store to keep my symmetric keys
21h
comment Should I use a key store to keep my symmetric keys
Key management is a huge topic, and you can start at the usual references: wikipedia and google-searches. Then you can have a look what NIST has to say about key management.
21h
reviewed Close Is the Vigenère Cryptosystem malleable?
21h
reviewed Close Modern integer factorization software
21h
reviewed Leave Open What is the difference between order of base point and curve order in EC?
21h
reviewed Close best scheme hash function for block cipher?
21h
reviewed Close can you suggest any applicayion for implementing threshold homomorphic encryption cryptosystem(Paillier cryptosystem)
21h
revised Minimum number of independent trials needed to detect a bias
Changed tag
21h
comment Elliptical curve cryptography key generation time
Concerning the naive approach: If you could do it that way, then brute forcing the key in the same manner would also be possible. Double-and-add is your only choice. (and its optimizations, especially NAF and wNAF are worth looking at)
2d
comment When would one prefer a proof of knowledge instead of a zero-knowledge proof?
Proofs of knowledge are used for example to prove the knowledge of a trapdoor. If you consider discrete logarithms for an element $y$ to some base $x$, you want to prove that you know $\log_x y$. But obviously, you would also want your proof to be zero-knowledge in this case, or you could just state the solution and say "This is it, this is proof that I knew the solution".
Nov
24
comment Decrypt with only the cipher file and the key?
Concerning the keylength: Don't take the 13 symbols as set in stone.