Reputation
7,089
Next tag badge:
88/100 score
22/20 answers
Badges
1 10 30
Newest
 Constituent
Impact
~60k people reached

2d
comment Is there any such thing as “proof of location”?
research.microsoft.com/en-us/um/people/vipul/pbc.pdf
2d
reviewed Close i cant understand the meaning and the difference between linearity equation and affine and non linearity?
2d
reviewed No Action Needed Is there any such thing as “proof of location”?
2d
reviewed No Action Needed Attack on Double Encryption Scheme
Jul
27
reviewed No Action Needed Hiding and Binding key in Groth-Sahai NIZK proof system
Jul
23
comment What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
Ok, thanks for making that clear!
Jul
23
revised What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
deleted 14 characters in body
Jul
23
comment What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
That's true, but doesnt it come quite close? UC was very fresh back then. But I guess you are the expert :)
Jul
23
revised What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
added 405 characters in body
Jul
23
comment What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
@Yehuda Lindell That's certainly true. But the poster asks for the simulator in context of this security model for anonymous credentials. Thanks you anyway, I will edit it into the question.
Jul
23
revised What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
added 47 characters in body
Jul
23
revised What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
added 1 character in body
Jul
23
revised What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
added 35 characters in body
Jul
23
revised What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
added 1 character in body
Jul
23
comment Publish my Encryption algorithm and test it
Sorry to say that, but I think you can safely publish your cipher here, nobody will steal it and it will get broken quite immediately. If you didn't concentrate on the math what was your focus??
Jul
23
answered What does “simulator” and “interactive” mean in a cryptographic credential system's definition of security?
Jul
20
comment ElGamal and Paillier key sizes for short messages
For such a limited interval as in the above answer you could also precompute a lookup table of all potential values $a'G$ and then decrypt as $aG=V-xU$ and look it up in the table. So you treat decryption efficiency for memory and a one-time precomputation cost.
Jul
20
comment Can Alice send Bob a secure message with only DSA and no key exchange?
Excellent answer as well! You may want to add some reference (e.g. Rompel) to make it clear that signatures can be constructed from one-way functions only (in your second last paragraph).
Jul
18
comment Deterministic ECDSA signatures?
Ah, didn't see that.
Jul
11
comment Is ElGamal IND-CCA1?
kodu.ut.ee/~lipmaa/papers/lip10