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Jun
30
comment Simulation aborted because the adversary doesn't use the random oracle
Do you really need perfect simulation? $\:$ (For general PKE purposes, computational simulation is enough.) $\;\;$
Jun
30
comment Mutual verification of shared secret
@StephenM347 : $\;\;\;$ In the last sentence of your bounty message, is "It" having "two parties establish a shared key, such that either they both know the key or neither do" or what the OP asked about? $\:$ I don't see any way to formalize what you described in the middle sentence of your bounty message, and I also do not see why the ability to do what the OP asked about would suffice for such a formalization. $\;\;\;\;\;\;\;\;$
Jun
28
comment Block Ciphers - Standardize plain text
en.wikipedia.org/wiki/Padding_(cryptography)#Bit_padding $\;$
Jun
27
reviewed No Action Needed HMAC for encrypted authentication token: recommended iteration number
Jun
27
reviewed Close Is algorithm with more than $2^{word size}$ words secure?
Jun
27
reviewed Close SQL-Like queries in CRYPTDB doesn't work
Jun
25
comment Is algorithm with more than $2^{word size}$ words secure?
What are "inter collisions"? $\:$ Do you have a formal definition for the $wordsize$ of an algorithm? $\hspace{.82 in}$
Jun
25
comment Why is HMAC-SHA1 still considered secure?
@user93353 : $\:$ Yes, signatures or more generally, direct use in the verification of documents. $\hspace{.86 in}$
Jun
25
comment Why is HMAC-SHA1 still considered secure?
@user93353 : $\:$ Yes, that's right. $\;\;\;\;$
Jun
23
comment Attack for RSA 1024 bit with Low Public Exponent
"(is is" $\: \mapsto \:$ "(it is" $\;\;\;\;$
Jun
23
comment On Proving That a Primitive Does Not Exist
What makes you think "the statement is about trying to rule out the implication $Q\to P$"? $\;\;\;$ It certainly seems like it's "about trying to rule out the implication" $\: P\to Q \;$. $\;\;\;\;\;\;\;\;$
Jun
23
comment Generating PGP key *without* random generator? (using fixed input only)
crypto.stackexchange.com/q/11214/991 $\;$
Jun
23
comment What is the danger if a non-prime is chosen for RSA?
@poncho : $\;\;\;$ I'm aware of this old result, which I believe is thoroughly obsoleted by the Bernstein paper I linked to in my previous comment. $\:$ Do you know of any other provable primality techniques such that [[the yielded [core public] and [core private] operations are always inverses of each other] and [provably, if RSA is secure then RSA-with-that-technique is secure] and [that technique's expected runtime is provably in $O\hspace{.02 in}(n^4\hspace{-0.05 in}\cdot \hspace{-0.04 in}polylog(n))$]]? $\;\;\;\;\;\;\;\;$
Jun
22
comment What is the danger if a non-prime is chosen for RSA?
Implementations definitely do not "follow up the probabilistic prime checks with exhaustive checks". $\:$ However, there might be implementations that "follow up the probabilistic prime checks with" $\hspace{.68 in}$ zero-error checks. $\;\;\;\;$
Jun
22
comment Frequency tables for HTML page source
What are 2A and 15A? $\:$ (I would imagine that one of them is space and the other is tab or newline.) $\hspace{.54 in}$
Jun
19
comment Is secure communication without public-key crytography feasible?
"Are there any algorithms out there which allow safe communication between peers in a non public/private key fashion?" $\:$ Yes, AES-SIV is such an algorithm. $\;\;\;\;$
Jun
19
revised Is secure communication without public-key crytography feasible?
improved grammar
Jun
19
comment Cardinality of the key space $\{0,1\}^\ell$
Should $\:\{\hspace{-0.03 in}0,\hspace{-0.04 in}1\hspace{-0.04 in}\}^{\hspace{-0.02 in}10}\:$ be replaced with $1024$? $\;\;\;$ If no, what does your $<$ symbol mean? $\hspace{1.54 in}$
Jun
18
comment Encrypt a file for multiple persons with different keys?
Even if such schemes don't ordinarily allow that, one could let the "key material"s be tuples whose entries are reception keys and a broadcasting key. $\;$
Jun
18
comment Encrypt a file for multiple persons with different keys?
en.wikipedia.org/wiki/Broadcast_encryption $\;$