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seen Jan 19 at 22:52

Jan
19
accepted Why is this authentication procedure using Rabin crypto not useful?
Jan
19
comment Why is this authentication procedure using Rabin crypto not useful?
I understand your clarification, lets assume the challenger chooses $m$ and computes everything and sends r to A, is it still not useful?
Jan
19
comment Why is this authentication procedure using Rabin crypto not useful?
I am not 100% sure how this can be interpreted, but in the case that $r$ is a quadrtic residue, is there anything strange in the method?
Jan
19
asked Why is this authentication procedure using Rabin crypto not useful?
Jan
18
awarded  Supporter
Jan
18
accepted One-time pad mistake in the transmission?
Jan
18
accepted RSA cipher wrong use
Jan
18
comment RSA cipher wrong use
Thank you very much, it is clear now to me.
Jan
18
comment RSA cipher wrong use
Thanks for your answer. I mean that before we use RSA I encode the message by converting each letter of the message to an integer (space=0, a=1,b=2,c=3,...) and then encrypting this integer $k$ as $k^e \mod N$ where $N=pq$ for p,q primes and $e$ is the encrypting exponent. Why is this procedure not effective?
Jan
18
comment One-time pad mistake in the transmission?
Thanks for your answer. How would the attacker proceed at the point he has access to both sequences?
Jan
18
asked RSA cipher wrong use
Jan
18
asked One-time pad mistake in the transmission?
Jan
16
accepted Substitution Cipher Help
Jan
16
comment Substitution Cipher Help
Thanks; "A merry christmas to all our readers"
Jan
16
comment Substitution Cipher Help
I will think about it, if you or someone else is able to solve it I would very much appreciate it
Jan
16
asked Substitution Cipher Help
Nov
26
awarded  Student
Nov
26
awarded  Scholar
Nov
26
accepted Upper bound Linear Feedback Shift Register
Nov
26
comment Upper bound Linear Feedback Shift Register
One think that is not 100% clear; In the case that the upper bound is achieved, why is it then achieved by any non-zero initial vector?