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visits member for 1 year, 5 months
seen Oct 22 at 11:51

Sep
23
comment Using modulus in one time pad?
@GuutBoy: Yes, Thanks, but your response is related to key generation, I modified my question, the keys are generated using a PRF ! Now, what is the role of the modulus M ???
Sep
23
awarded  Curious
Sep
22
revised Using modulus in one time pad?
added 89 characters in body
Sep
22
comment Using modulus in one time pad?
So, for generating the keys, I use a PRF such as HMAC, which outputs a key of fixed size .e.g. 160 bits so, if the key generation is secure, what is the need of using a MODULUS ??? Where are you, experts !!
Sep
22
comment Using modulus in one time pad?
so, we have to use a finite group to provide security !? Can you please give me any link...for this !?
Sep
22
comment Using modulus in one time pad?
Yes, but in terms of security, what is the role of M !?
Sep
22
awarded  Commentator
Sep
22
comment Using modulus in one time pad?
So, for security reason, we must use the modulus ???
Sep
22
asked Using modulus in one time pad?
Mar
4
comment IND-CPA Security
the community recommend me that instead of KDF I use a PRF(Pseudo Random Function) such as AES (or any block cipher) replacing KDF(K|n) with AES(K,n) where K is the key to AES and n a non-repeating counter or a non-repeating nonce (both implementations give me an IND-CPA encryption ! ?).
Mar
1
comment IND-CPA Security
I am using a secure KDF to randomize the outputs from one message to another. The derived key Kn=KDF(k|n) is then used in OTP namely C = Kn Xor M .
Feb
28
comment IND-CPA Security
@K.G: Symmetric encryption.
Feb
28
comment IND-CPA Security
@rath Yes......
Feb
28
asked IND-CPA Security
Sep
1
accepted HMAC-SHA1 input size
Sep
1
accepted Homomorphic Encryption
Aug
30
comment The security of an encrypt-and-MAC
What about this attack "Breaking and provably repairing the SSH authenticated encryption scheme: A case study of the Encode-then-Encrypt-and-MAC paradigm." on my example @#, the ECIES standard is based on this construction, the only difference is the encryt-and-MAC (Encrypt-then-MAC for ECIES which provides the cca security) that difference which I am looking for ... in terms of security.
Aug
29
awarded  Scholar
Aug
29
accepted How to hash a list of multiple items?
Aug
29
comment The security of an encrypt-and-MAC
Concerning the impracticability, can you be more precise!?