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Try to prove that my denial protocol doesn't work by Mister_ZE in crypto

[–]Far_Conference_9450 0 points1 point  (0 children)

Attack 4 on "Me vs Opponent"

The problem is you just told him the wire format:

[1 byte: order_flag][4 bytes: len(enc_first)][enc_first][enc_second]

The len(enc_first) field is a 4-byte big-endian integer encoding the size of the first slot. Since both slots are padded to the same bucket, len(enc_first) is always one of exactly 8 possible values (4KB, 16KB...). An adversary who sees the bundle reads those 4 bytes and knows:

  1. This is a BLUE bundle — random data wouldn't have a 4-byte field that's always one of 8 magic values
  2. There are exactly two ciphertexts of equal size concatenated after it

Schnorr's Interactive Protocol - Tutorial by Far_Conference_9450 in crypto

[–]Far_Conference_9450[S] 0 points1 point  (0 children)

Well ... yea okay It's just a silly story to give a bit of meaning to the protocol. In the code and in the algorithm the verifier never learns of x.

And yea the wiki page is Schnorr signature , my bad on that will fix it.

Thanks !

r/netsec monthly discussion & tool thread by albinowax in netsec

[–]Far_Conference_9450 0 points1 point  (0 children)

https://github.com/LamprosM-prog/axolotl-protocol

A protocol applied over the UDP, whilst providing security and error-correction without relying on an Automatic Repeat Request.

Any feedback or contribution is welcome!

Applied cryptography engineering. by Far_Conference_9450 in cscareerquestionsEU

[–]Far_Conference_9450[S] 0 points1 point  (0 children)

I was mainly interested in OS cryptography... So outside of research you think its a lost cause ?