So if it's a new key version V5, may be it would be reasonable to go with a
the new hash standard, SHA 3 (Keccak)
Surprised that nobody has mentioned Suite B:
https://www.nsa.gov/ia/programs/suiteb_cryptography/index.shtml
Last updated a couple of months ago to advise:
"Use SHA-384 to protect up to TOP SECRET."
http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
--
Steve P
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