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Jan
14
revised Updating the secret key used for HMAC
fixed spelling and spacing
Jan
14
comment What cryptanalysis is possible against two independent keystreams XORed against plaintext?
What he's talking about is a cascade of stream ciphers. $\;$
Jan
13
comment Possible to use an accumulator to “license” or restrict the qty of certificates being used?
Every "signature scheme which is valid for an unbounded number of signatures (the current design)" is "an n-time signature scheme". $\:$ However, for direct constructions of n-time signature schemes, your suggestion would allow for somewhat-short arguments that the child CA misbehaved. $\;\;\;\;$
Jan
10
comment How much (home PC) CPU time is required to generate a prime number of a given size?
@Reid : $\:$ This paper gives an intermediate approach. $\;\;\;\;$
Jan
10
comment How much (home PC) CPU time is required to generate a prime number of a given size?
Since "the prime number computed should be immediately next to the given random number," the best known bounds on the time grow more quickly than the square-root of "the given random number". $\hspace{.55 in}$
Jan
9
revised Key derivation of public key without knowledge of private key?
attempted a summary of how it could be used
Jan
8
answered Key derivation of public key without knowledge of private key?
Jan
5
comment Analyzing security flaws of cipher
Furthermore, an adversary would have more than a 28% chance of learning $A$ and $b$ with just 513 independently-and-uniformly distributed plaintext-ciphertext pairs. $\;$
Jan
3
comment Why are there no MACs inspired by block cipher modes other than CBC and CFB?
What makes you think that MACs "can only be produced in CBC and CFB mode"? $\hspace{1.48 in}$
Jan
2
reviewed Reviewed Adding a Password Hash (key derivation) function to existing password storage solution
Jan
2
revised Adding a Password Hash (key derivation) function to existing password storage solution
improved grammar and capitalization
Jan
2
comment Size of a MAC for a quickly checked message?
I believe that time from creation to verification is irrelevant for the size of MAC tags.
Jan
2
answered Asymmetric sign in public enviroment
Jan
1
answered How to use HMAC for authenticating multiple messages
Dec
30
comment Possible to know who is the owner of a message encrypted with RSA public key
owner $\mapsto$ receiver $\:$ ? $\;\;\;\;$
Dec
30
comment Possible to know who is the owner of a message encrypted with RSA public key
"I sign this" $\: \mapsto \:$ "I encrypt these" $\;\;\;$ ? $\;\;\;\;\;\;\;$
Dec
29
comment Possible to know who is the owner of a message encrypted with RSA public key
How do you "sign this messages with their public keys"? $\:$ Do you also have their private keys? $\hspace{.74 in}$
Dec
29
comment Is there a way to “shorten” a Merkle chain?
What is "a Merkle chain of 3 items"? $\;$
Dec
23
comment Obliviously computing the Least common multiple of two poylnomials
What ring are those polynomials over? $\;$
Dec
23
reviewed Edit PBKDF vs HKDF for pretty long key