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seen Mar 14 at 15:37

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!?
Aug
29
awarded  Supporter
Aug
29
comment The security of an encrypt and MAC
Does not respond to my question: in the construction above (my example), and about the security of plaintext (is it affected by the encrypt-and-MAC ?). I know that the latter can (only) provide the integrity of plaintext contrarily to the encrypt-then-MAC. Roughly speaking, Can we said that in the example above the confidentiality and integrity of "data" are provided (Of course, with considering the keys updates)
Aug
29
asked How to hash a list of multiple items?
Aug
29
awarded  Editor
Aug
29
revised The security of an encrypt and MAC
added 4 characters in body; edited tags
Aug
29
asked The security of an encrypt and MAC
Aug
28
asked HMAC-SHA1 input size
Jul
12
comment Homomorphic Encryption
What about the BGN scheme ?
Jul
10
awarded  Student