chacha20+poly1305 authenticated encryption

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committed - thanks

On Sun, 1 Dec 2013, Jon Cave wrote:

> There is a small typo in the new protocol document where it mistakenly
> references "Poly1306".
> 
> - Jon
> 
> Index: usr.bin/ssh/PROTOCOL.chacha20poly1305
> ===================================================================
> RCS file: /cvs/src/usr.bin/ssh/PROTOCOL.chacha20poly1305,v
> retrieving revision 1.1
> diff -u -r1.1 PROTOCOL.chacha20poly1305
> --- usr.bin/ssh/PROTOCOL.chacha20poly1305	21 Nov 2013 00:45:43 -0000	1.1
> +++ usr.bin/ssh/PROTOCOL.chacha20poly1305	1 Dec 2013 14:15:21 -0000
> @@ -47,7 +47,7 @@
>  the MAC. By using an independently-keyed cipher instance to encrypt the
>  length, an active attacker seeking to exploit the packet input handling
>  as a decryption oracle can learn nothing about the payload contents or
> -its MAC (assuming key derivation, ChaCha20 and Poly1306 are secure).
> +its MAC (assuming key derivation, ChaCha20 and Poly1305 are secure).
> 
>  The AEAD is constructed as follows: for each packet, generate a Poly1305
>  key by taking the first 256 bits of ChaCha20 stream output generated
> 
> 
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> openssh-unix-dev at mindrot.org
> https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
> 


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