[cap-talk] use of hashcodes?

[Tyler Close]

The ETag values in Waterken are a SHA-256 HMAC of all state and code
used during a query. You'd have a pretty good paper if you could
generate a collision.

--Tyler

On Fri, Feb 19, 2010 at 11:17 AM, Raoul Duke <raould at gmail.com> wrote:
> hi,
>
> I'm wondering how people feel about using hashcodes wrt making
> promises about the behaviuor/quality/security of a system, since
> hashcodes have collisions. E.g. i was skimming the recent
> waterken-joe-e paper and it mentioned using hashcodes to make caching
> work well, and it said, "two responses with the same ETag must yield
> the same text" so i'm wondering about the case of 2 different texts
> colliding in ETag space. Thanks for any edification -- i might be
> totally confused here -- and/or thoughts.
>
> sincerely.
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