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1d
reviewed Leave Open Minimum number of independent trials needed to detect a bias
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reviewed Close Can someone please explain to me what this means?
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reviewed Close can you suggest any applicayion for implementing threshold homomorphic encryption cryptosystem(Paillier cryptosystem)
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reviewed No Action Needed Email Encryption
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reviewed No Action Needed Computation indistinguishability questions
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reviewed No Action Needed Diceware word list for six dice
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reviewed No Action Needed Repeatedly using same key on different plaintexts
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awarded  Nice Answer
2d
comment Can someone please explain to me what this means?
Might I suggest you ask your professor what he meant by that?
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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?
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reviewed Close Javascript Information Dispersal Algorithm
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revised Elliptical curve cryptography key generation time
deleted 1 character in body
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reviewed No Action Needed CoAP authentication using DTLS
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reviewed No Action Needed Sharing an encrypted file between a group of people
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reviewed Leave Open What is the difference between IND-CCA2 and NM-CCA2? And how does one imply another?
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reviewed Close Decrypt with only the cipher file and the key?
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reviewed Close Feistel network output if round function is the identity function
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revised Elliptical curve cryptography key generation time
added 201 characters in body
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answered Elliptical curve cryptography key generation time
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comment Elliptical curve cryptography key generation time
@ddddavidee: in this case, the naive algorithm (perform $d-1$ point additions) is so expensive that it can't even be done one.