[Cryptography] Herradura - Key Exchange scheme in the style of Diffie Hellman

[Omar Herrera Reyna]

On Tue, Dec 19, 2017 at 4:20 PM Omar Herrera Reyna <0h3rr3r4 at gmail.com>
wrote:

> To those interested,
>
> I'm including the code of a little scheme for key exchange similar to a DH
> Key exchange process. Under this scheme, where Alice and Bob exchange some
> numbers that are produced and then recombined by an iterative function that
> is based on simple bit-wise operations, Eve has to figure out a way to find
> ant test efficiently pairs of inputs to the core function of this scheme
> (different combinations of inputs result can produce the same result but
> you require the same inputs to perform the final combination that provide
> Alice and Bob with the same key at the end of the process.
>
> I'm not making any claims regarding the security of this system, but I
> believe it can be interesting to spark some discussion about alternatives
> to current key exchange schemes and their associated mathematical problems.
>
> More details and demo source code (in C) is available here:
> https://github.com/Caume/HerraduraKEx
>
> A sample of the output of the demo source code (which should compile
> without modification in any Linux system) is provided here:
>
> -----
>
> ALICE:
> 15076425430454950481 A [Secret 1]
> 5065174741009230133 B [Secret 2]
> 6616145336279823145 D [FSCX_REVOLVE(A,B,16)] ->
>                    BOB:
>                    A2 5640910407791789943 [Secret 3]
>                    B2 2734548036544947114 [Secret 4]
>                 <- D2 7953994751009905686 [FSCX_REVOLVE(A2,B2,16)]
> 11220837854338859672 FA [FSCX_REVOLVE(D2,B,48) xor A]
>                  FA = FA2 11220837854338859672 [FSCX_REVOLVE(D,B2,48) xor
> A2]
> EVE: NOT (D xor D2)= 14577306244540485824
> EVE: D xor D2= 3869437829169065791
> EVE: FSCX(D,D2)= 14126811020873148126
> EVE: FSCX(D2,D)= 14126811020873148126
> EVE: FSCX(D,D2) xor D= 11519582121138542071
> EVE: FSCX(D2,D) xor D= 11519582121138542071
>
>    ...
>
> EVE: FSCX_REVOLVE_PRINT(D,D2,64)= 6616145336279823145
>
>    ...
> -----
>
>
Update: Added an encryption protocol (HAEN) and code, based on HKEX and the
FSCX function
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.metzdowd.com/pipermail/cryptography/attachments/20190213/8bf45d69/attachment.html>