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I like crypto. Need I say more?


Dec
4
revised How hard is to invert the function that computes the middle-bits of (x^2)?
deleted 67 characters in body
Dec
4
revised How hard is to invert the function that computes the middle-bits of (x^2)?
deleted 67 characters in body
Dec
4
answered How hard is to invert the function that computes the middle-bits of (x^2)?
Dec
4
revised How hard is to invert the function that computes the middle-bits of (x^2)?
added 2 characters in body
Dec
3
reviewed Approve suggested edit on Is the composition of collision resistant hash with non collision resistant hash a collision resistant hash?
Dec
2
comment What does this step in this protocol for the Yao's Millionaire Problem mean?
1-2 does not mean 1 out of 2 bits it means 1 item out of a set of two items. The items can be any length.
Nov
30
awarded  Enlightened
Nov
28
revised Can homomorphic encryption filter?
added 34 characters in body
Nov
28
revised Can homomorphic encryption filter?
edited body
Nov
28
answered Can homomorphic encryption filter?
Nov
28
comment Homomorphic Encryption and Semantic Security using Lattices?
@curious $e$ is the error part of learning with errors. There are some good tutorials out there on the LWE problem that might help. $a$ is like the random values used in Paillier or ElGamal. Those random values are not part of the secret key.
Nov
28
comment Homomorphic Encryption and Semantic Security using Lattices?
@noloader the BGV system is probably the most popular one and has a few optimizations (1 and 2) plus an implementation.
Nov
27
comment Homomorphic Encryption and Semantic Security using Lattices?
Is there a reason you chose that specific FHE cipher? I believe the standard LWE ciphers are much less efficient compared to the ring LWE ciphers.
Nov
27
answered How do you prevent the risk of damage to the security of Fully Homomorphic Encryption?
Nov
27
comment What are the practical differences between 256-bit, 192-bit, and 128-bit AES encryption?
Came across this today. Very good. The wikipedia article on AES confused me. Under The MixColumns Step they give the a matrix used for multiplication when using a "128-bit key". Thought the mix columns step was the same for all key sizes in AES, but different when the block size changes. Is wikipedia wrong?
Nov
26
awarded  Popular Question
Nov
25
revised Shamir's Simple Sharing Scheme - preventing partial recovery of data
added 138 characters in body
Nov
25
answered Shamir's Simple Sharing Scheme - preventing partial recovery of data
Nov
25
comment Shamir's Simple Sharing Scheme - preventing partial recovery of data
Can you post a link to the online system? XOR secret sharing would exhibit the behavior you describe.
Nov
22
comment What scheme will allow merging and splitting the result of a function?
Could you give a simple concrete example of what you are looking for but w/o any crypto? I'm still just having a hard time understanding the question.