On Dec 15, 2015, at 4:14 PM, Eric Rescorla wrote:

> Watson kindly prepared some text that described the limits on what's safe
> for AES-GCM and restricting all algorithms with TLS 1.3 to that lower
> limit (2^{36} bytes), even though ChaCha doesn't have the same
> restriction.
> 
> I wanted to get people's opinions on whether that's actually what we want
> or whether we should (as is my instinct) allow people to use ChaCha
> for longer periods.

Perhaps the algorithm registration can provide the limit, allowing 
implementations use the full period for each algorithm.

Russ


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