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seen Sep 13 '13 at 4:13

Aug
27
awarded  Popular Question
Sep
4
comment What is the relation between hash chaining and chosen prefix attack
@D.W. This post does suggest it prevents collisions: quora.com/Cryptography/… Chosen prefix collision attack: Even if one could find appendages appA and appB such that, md5(textA • appA) == md5(textB • appB) It would be very unlikely (or again, probably impossible) for the following to be true as well: md5(md5(textA • appA) • textA • appA) == md5(md5(textB • appB) • textB • appB)
Sep
2
comment What is the relation between hash chaining and chosen prefix attack
@D.W. Then why is it mentioned that chaining prevents collisions?
Aug
31
comment Why is the complexity of RSA-1024 80 bit and not 86 bit?
Does a strength of 80 bit mean you need to bruteforce through 2^80 possibilities?
Aug
31
comment Why is the complexity of RSA-1024 80 bit and not 86 bit?
Does a strength of 80 bit mean you need to bruteforce through 2^80 possibilities?
Aug
31
comment Why is the complexity of RSA-1024 80 bit and not 86 bit?
@poncho Did you just claim that a "2048" bit RSA key does not have a 2048 bit Modulus? And you really NEED a 1024 bit public component for a "2048" bit RSA key? I guess '65537' is not 1024 bit.
Aug
30
comment Why is the complexity of RSA-1024 80 bit and not 86 bit?
Could I be mistaken that the modulus size is twice the length of the key sizes?
Aug
30
comment Why is the complexity of RSA-1024 80 bit and not 86 bit?
@poncho Don't try to confuse people with that statement, please.
Aug
30
comment Security strength of RSA in relation with the modulus size
"The value of k is commonly considered to be the key size." See page 64 of NIST SP 800-57
Aug
30
suggested rejected edit on Security strength of RSA in relation with the modulus size
Aug
30
suggested rejected edit on Security strength of RSA in relation with the modulus size
Aug
30
revised Why is the complexity of RSA-1024 80 bit and not 86 bit?
added 76 characters in body
Aug
30
comment Security strength of RSA in relation with the modulus size
Could you explain why the strength is 80 and not 86 for RSA-1024?
Aug
30
revised Why is the complexity of RSA-1024 80 bit and not 86 bit?
added 46 characters in body
Aug
30
comment If we can find prime numbers larger than 17 milion digits, why can't we find all 1024bit primes?
But strength of RSA-1024 is just 2^80 (80 bits) and not 2^1013.5
Aug
30
comment If we can find prime numbers larger than 17 milion digits, why can't we find all 1024bit primes?
I guess General Number Field Sieve is efficient in this. It probably skips a lot of primes. || I also don't see why you mutliply with (2^1024-1) and divide by 2.
Aug
30
asked Why is the complexity of RSA-1024 80 bit and not 86 bit?
Jul
31
revised Explain the 'Breaking 104 bit WEP in less than 60 seconds' paper
deleted 20 characters in body; edited title
Jul
24
awarded  Commentator
Jul
24
comment Explain the 'Breaking 104 bit WEP in less than 60 seconds' paper
'many years' <-- they cracked it in less than 60 seconds... How would it even make sense to talk about 'how many years'....