[smime] deprecate tripleDES?

HI!

Isn't it the time to deprecate using tripleDES and add a stronger SHOULD for
using stronger symmetric ciphers?

The text from https://tools.ietf.org/html/rfc5751#section-2.7.1.2 is pretty
blurry:

   [..] If the sending agent
   chooses not to use AES-128 in this step, it SHOULD use tripleDES.

Ciao, Michael.

smime.p7s
Description: S/MIME Cryptographic Signature

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