On Jul 6, 2014, at 3:09 PM, Yaron Sheffer <[email protected]> wrote:

>> bullet 5   Implementations SHOULD prefer cipher suites with greater than
>> 128 bits of effective key length
> 
> No, this contradicts our recommendation, and IMO is too strict for the 
> current state of the industry. In other words, people are perfectly happy 
> with AES-128 today and it is NOT our goal to push to AES-256.

For a BCP, I don’t see how a SHOULD prefer >128 is too strict. 

This isn’t a MUST, and certainly isn’t a requirement that only the 256 bit 
variants are used. Personally, if someone asks me what the best practice today 
is - I wouldn’t hesitate to say that 256 should be prioritized over 128, and 
128 prioritized over 112. There may be environments where this isn’t practical 
- and that’s why this isn’t a MUST, but it is what SHOULD be done.

-- 
Adam Caudill
[email protected]
http://adamcaudill.com/


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