[ntpwg] Stonger symmetric NTP authentication

[Bhatia, Manav (Manav)]

Hi,

Is there any plan underway to use
HMAC-SHA-1/HMAC-SHA-256/HMAC-SHA-384/etc for NTPv4? We could use the
extension field header to encode the new hash digest, or it could be
prepared in such a way that its generic enough to support any crypto
algorithm. The new extension field header could also include a
monotonically increasing sequence number that could help prevent replay
attacks.

Cheers, Manav