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*To*: [email protected]*Subject*: Red Pike cipher*From*: [email protected] (Cathal Garvey)*Date*: Thu, 27 Feb 2014 22:50:30 +0000*In-reply-to*: <[email protected]>*References*: <[email protected]>

So, if I understand this right; x and k are pairs of 32-bit numbers, as Red Pike is a 64-bit block system and 32 is the maximum int size on most platforms. k is key material, x is a pointer to the data. No state is preserved when encrypting x with k, so to encrypt lots of data, you must string it into a series of "x" and apply the cipher to each block. Am I mistaken? Is this any better than AES-ECB, then, if no cipher state is preserved between encrypted blocks? On 27/02/14 13:08, Anonymous Remailer (austria) wrote: > /* Red Pike cipher source code */ > > #include <stdint.h> > > typedef uint32_t word; > > #define CONST 0x9E3779B9 > #define ROUNDS 16 > > #define ROTL(X, R) (((X) << ((R) & 31)) | ((X) >> (32 - ((R) & 31)))) > #define ROTR(X, R) (((X) >> ((R) & 31)) | ((X) << (32 - ((R) & 31)))) > > void encrypt(word * x, const word * k) > { > unsigned int i; > word rk0 = k[0]; > word rk1 = k[1]; > > for (i = 0; i < ROUNDS; i++) > { > rk0 += CONST; > rk1 -= CONST; > > x[0] ^= rk0; > x[0] += x[1]; > x[0] = ROTL(x[0], x[1]); > > x[1] = ROTR(x[1], x[0]); > x[1] -= x[0]; > x[1] ^= rk1; > } > > rk0 = x[0]; x[0] = x[1]; x[1] = rk0; > } > > void decrypt(word * x, const word * k) > { > word dk[2] = > { > k[1] - CONST * (ROUNDS + 1), > k[0] + CONST * (ROUNDS + 1) > }; > > encrypt(x, dk); > } > -- Please help support my crowdfunding campaign, IndieBB: Currently at 43.2% of funding goal, with 14 days left: http://igg.me/at/yourfirstgmo/x/4252296 T: @onetruecathal, @IndieBBDNA P: +3538763663185 W: http://indiebiotech.com -------------- next part -------------- A non-text attachment was scrubbed... Name: 0x988B9099.asc Type: application/pgp-keys Size: 6176 bytes Desc: not available URL: <http://cpunks.org/pipermail/cypherpunks/attachments/20140227/ff26aa93/attachment.key> -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 901 bytes Desc: OpenPGP digital signature URL: <http://cpunks.org/pipermail/cypherpunks/attachments/20140227/ff26aa93/attachment.sig>

**Follow-Ups**:**Red Pike cipher***From:*[email protected] (Peter Gutmann)

**References**:**Red Pike cipher***From:*[email protected] (Anonymous Remailer (austria))

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