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  • 0 posts edited
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  • 15 votes cast
Feb
9
awarded  Notable Question
Nov
11
awarded  Popular Question
Oct
4
accepted Stream Ciphers and cycling questions
Oct
3
comment Stream Ciphers and cycling questions
Are there any practical stream ciphers which modify their internal state by injecting the encrypted data?
Oct
3
asked Stream Ciphers and cycling questions
Sep
28
awarded  Yearling
Sep
28
awarded  Citizen Patrol
Sep
28
reviewed Reject Why is public key cryptography (RSA) used in sites like Google or Facebook?
Jul
8
reviewed Approve Using C_Sign to create a PKCS7 signature
Jun
30
accepted Why is HMAC-SHA1 still considered secure?
Jun
25
comment Why is HMAC-SHA1 still considered secure?
@StephenTouset - yeah I got that. However, is there any usage of SHA-1 from which you should run away rather than move away or walk away.
Jun
25
accepted Dan Boneh's Cryptography lecture - problem with 802.11b
Jun
25
comment Dan Boneh's Cryptography lecture - problem with 802.11b
Note that the problem with WEP was that they reused the input (i.e. the seed) to the PRG, it was not because the output cycled around! - yes I did understand that. However, I didn't know that PRGs didn't cycle. Thank you
Jun
25
comment Why is HMAC-SHA1 still considered secure?
@RickyDemer - Thank you
Jun
25
comment Why is HMAC-SHA1 still considered secure?
@RickyDemer - So is there any application of SHA1 where it is not secure?
Jun
25
comment Why is HMAC-SHA1 still considered secure?
@CodesInChaos - you say that HMAC-SHA1 is a problem only if the key is known. But if the key is known, that will be a problem for any HMAC-hash operation, right?
Jun
25
comment Why is HMAC-SHA1 still considered secure?
If the key is known to the attacker, then even SHA2 will be a problem, right?
Jun
25
asked Dan Boneh's Cryptography lecture - problem with 802.11b
Jun
25
comment Why is HMAC-SHA1 still considered secure?
So when should SHA1 not be used? i.e. discovery of the issue in SHA1 precludes it from use where?
Jun
25
comment Why is HMAC-SHA1 still considered secure?
So when should SHA1 not be used? i.e. discovery of the issue in SHA1 precludes it from use where?