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revised A Doubt with the twisted-PRF
deleted 613 characters in body; edited title
Oct
26
comment A Doubt with the twisted-PRF
Let us continue this discussion in chat.
Oct
26
comment A Doubt with the twisted-PRF
But as I've said "...the proof cannot go on, it doesn't show $((a,a' ),F(k,(a,a'))$ and $((a,a'),R)$ isn't indistinguishable.", in other words, the problem of original twisted PRF maybe don't exist.
Oct
26
comment A Doubt with the twisted-PRF
what "that" means?
Oct
26
comment A Doubt with the twisted-PRF
Maybe I don't express myself clearly, I mean that the author give a wrong way to show the problem of original twisted PRF . And, I don't think the proof cannot go on is a problem....
Oct
26
asked A Doubt with the twisted-PRF
Sep
25
asked impersonating attack against a protocol
Sep
24
awarded  Autobiographer
Sep
22
comment Help to understand the chameleon hash function?
@AndrewPoelstra:you can refer to the paper "The proof of Theorem 4"
Sep
20
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..
Sep
19
comment Diffie-Hellman and man-in-the-middle attacks
possible duplicate of Diffie-Hellman Key Exchange with Authentication: Man-in-the-Middle query
Sep
14
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)
Sep
13
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.
Sep
13
revised Help to understand the chameleon hash function?
edited tags
Sep
13
asked Help to understand the chameleon hash function?
Sep
8
comment How does one calculate the scalar multiplication on elliptic curves?
what software do you draw the map with? It's very beautiful.
Aug
30
answered In HMQV, can one use multiple identities with one public key?
Aug
29
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.
Aug
29
comment How to distribute symmetric key between $n$ entities?
maybe group key exchange will also work
Jul
30
awarded  Yearling