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  • 24 votes cast
Aug
5
comment Is this correct way to generate stream cipher using AES CTR mode?
all the four proposed scheme is one-to-one. i.e. Alice is encrypting data and alice is searching over encrypted data. the server (Bob) search for W in the cipher-text by checking C xor W is of the form <s,F(s)> for some s. with help of key "k" how server compute s,F(s) from <s,F(s)> as the length of s,F(s) are not known.
Jun
25
awarded  Notable Question
Jun
24
comment Use of ElGamal encryption for signature generation
Elgamal cryptosystem also hold the property of commutative (paper: DAI Wei " Commutative-like Encryption: A New Characterization of ElGamal ")
Apr
3
awarded  Popular Question
Mar
19
awarded  Popular Question
Mar
16
awarded  Critic
Mar
16
comment CCA-attack is possible in RSA, but how the decryption key $d$ is known to anyone
i am talking about text-book RSA,and CCA-attack on it.
Mar
16
revised CCA-attack is possible in RSA, but how the decryption key $d$ is known to anyone
added 12 characters in body
Mar
16
asked CCA-attack is possible in RSA, but how the decryption key $d$ is known to anyone
Feb
27
asked Drawback of ElGamal encryption
Feb
24
comment In a additive group is it hard to calculate $bg$ given $ag, g, abg$
yes you are correct a,b are integers not element of group.
Feb
23
revised In a additive group is it hard to calculate $bg$ given $ag, g, abg$
deleted 9 characters in body; edited tags
Feb
23
asked In a additive group is it hard to calculate $bg$ given $ag, g, abg$
Feb
9
revised Identity-Based Encryption consist of four algorithms. Extract phase is one of them and it is done by PKG or receiver?
added 1 character in body
Feb
9
reviewed Approve Identity-Based Encryption consist of four algorithms. Extract phase is one of them and it is done by PKG or receiver?
Feb
9
comment Identity-Based Encryption consist of four algorithms. Extract phase is one of them and it is done by PKG or receiver?
Are you saying that in IBE, PKG is not necessary.
Feb
9
asked Identity-Based Encryption consist of four algorithms. Extract phase is one of them and it is done by PKG or receiver?
Feb
8
comment In a group, is it hard to calculate the base $g$ given $g^a$ and $a$?
is it mean that in cyclic group it can be calculated by finding inverse of a, but in general like RSA encryption it is not true.
Feb
8
comment In a group, is it hard to calculate the base $g$ given $g^a$ and $a$?
correct. but in modulo arithmetic is it correct?
Feb
8
asked In a group, is it hard to calculate the base $g$ given $g^a$ and $a$?