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 Nov7 comment Are there some problems to use pseudo-random number generator in Smart Card? That's to say I want to find some disadvantages of including the PRNG in smart card. Nov7 comment Are there some problems to use pseudo-random number generator in Smart Card? So, it's better not to include PRNG in the smart card? Actually, I tend to not to include PRNG in the smart card, and I want to find some words to support this. Nov7 asked Are there some problems to use pseudo-random number generator in Smart Card? Sep25 asked impersonating attack against a protocol Sep24 awarded Autobiographer Sep22 comment Help to understand the chameleon hash function? @AndrewPoelstra:you can refer to the paper "The proof of Theorem 4" Sep20 comment Help to understand the chameleon hash function? @Andrew Poelstra, I'm sorry that you have made a mistake, as $a(t)=(t-t_1)(t-t_2)$ so $a(t_i)=0$. The proof of Theorem 4 is right, you are wrong. you need to reconsider.. Sep19 comment Diffie-Hellman and man-in-the-middle attacks possible duplicate of Diffie-Hellman Key Exchange with Authentication: Man-in-the-Middle query Sep14 comment Help to understand the chameleon hash function? Now, I'm thinking about making this Non-Interactive Key Exchange to be interactive and identity-based in the standard model, would you give me some suggestions?(Or maybe to cooperate to do this, if you will) Sep13 comment Help to understand the chameleon hash function? Actually, I don't quite understand what you have said. Maybe the proof of this part can provide some clues, but I think there are some problems with the Proof of Theorem 4. Sep13 revised Help to understand the chameleon hash function? edited tags Sep13 asked Help to understand the chameleon hash function? Sep8 comment How does one calculate the scalar multiplication on elliptic curves? what software do you draw the map with? It's very beautiful. Aug30 answered In HMQV, can one use multiple identities with one public key? Aug29 comment How does Random Oracle and Standard Model differ? but proof in the random oracles model is easier than that in the standard model. Although there are some flaws with ROM, in a certain cases where a crptosystem is hard to prove in the standard model, then it's not a bad idea to switch to the ROM. At least, it's better than nothing. Aug29 comment How to distribute symmetric key between $n$ entities? maybe group key exchange will also work Jul30 awarded Yearling May18 comment Is knowing the private key of RSA equivalent to the factorization of $N$? when we select $e,d$, generally speaking, if they should $e,d <\phi(N)$ ? May12 comment RSA, finding p,q May11 accepted Is knowing the private key of RSA equivalent to the factorization of $N$?