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Dec
3
reviewed Close suitable programming language for cryptography algorithms
Dec
3
awarded  symmetric
Dec
2
comment Using the same symmetric key in both directions?
"They are sharing an IV" -- what do you mean by that?
Dec
2
revised Using the same symmetric key in both directions?
Added a warning
Dec
2
answered Using the same symmetric key in both directions?
Dec
2
reviewed Close Issue about randomness : what if random looks “human” ?
Dec
2
reviewed Close How Brittle Are LCG-Cracking Techniques?
Dec
2
reviewed Leave Open Factoring a number who has factors with same number of digits
Dec
2
reviewed Close Does SHA-1 hash have quasi commutative property?
Dec
2
reviewed Leave Open how to represent message as an integer between $1$ and $n-1$
Dec
2
reviewed Leave Open Is the Vigenère Cryptosystem malleable?
Nov
26
reviewed Leave Open Minimum number of independent trials needed to detect a bias
Nov
26
reviewed Close can you suggest any applicayion for implementing threshold homomorphic encryption cryptosystem(Paillier cryptosystem)
Nov
26
reviewed No Action Needed Email Encryption
Nov
26
reviewed No Action Needed Computation indistinguishability questions
Nov
26
reviewed No Action Needed Diceware word list for six dice
Nov
26
reviewed No Action Needed Repeatedly using same key on different plaintexts
Nov
25
awarded  Nice Answer
Nov
25
comment Cracking RSA with Small exponent 5
To expand what mikeazo said, if they did things properly, then you are unlikely to find a solution. Did you get this as homework (or from someone who indicated that things weren't done properly)? The two obvious things that they might have done wrong is selecting $p$ and $q$ extremely close (so Fermat factorization works), or selected a plaintext message $P < \sqrt[5]{N}$ (in which case computing the fifth-root of the ciphertext gives you P); have you checked both of those?
Nov
25
revised Elliptical curve cryptography key generation time
deleted 1 character in body