Re: [Cfrg] Fwd: I-D Action: draft-nir-cfrg-chacha20-poly1305-00.txt

[Ilari Liusvaara <[e-mail]>]

On Mon, Jan 27, 2014 at 10:15:26PM +0000, Yoav Nir wrote:

> Filename        : draft-nir-cfrg-chacha20-poly1305-00.txt



>   Rounds 1-4 are part of the "column" round, while 5-8 are part of the
>   "diagonal" round:

Should the first "Rounds" be "Quaterrounds" or something?

>   AEAD Construction for Poly1305:
>   000  50 51 52 53 0c 00 00 00 00 00 00 00 0c 00 00 00|PQRS............
>   016  00 00 00 00 d3 1a 8d 34 64 8e 60 db 7b 86 af bc|.......4d.`.{...
>   032  53 ef 7e c2 a4 ad ed 51 29 6e 08 fe a9 e2 b5 a7|S.~....Q)n......
>   048  36 ee 62 d6 3d be a4 5e 8c a9 67 12 82 fa fb 69|6.b.=..^..g....i
>   064  da 92 72 8b 1a 71 de 0a 9e 06 0b 29 05 d6 a5 b6|..r..q.....)....
>   080  7e cd 3b 36 92 dd bd 7f 2d 77 8b 8c 98 03 ae e3|~.;6...-w......
>   096  28 09 1b 58 fa b3 24 e4 fa d6 75 94 55 85 80 8b|(..X..$...u.U...
>   112  48 31 d7 bc 3f f4 de f0 8e 4b 7a 9d e5 76 d2 65|H1..?....Kz..v.e
>   128  86 ce c6 4b 61 16 72 00 00 00 00 00 00 00      |...Ka.r.......

What are that stuff at the begnning (the first 20 bytes)? The
12 byte additional data + its length?


-Ilari