Right, that's why we have david Kemp's comment
> The other Peter's suggestion:
Time ::= CHOICE { utcTime UTCTime, generalizedTime GeneralizedTime, epochSeconds INTEGER}
> is fine with me, but I'm not sure existing applications would deal with > an unrecognized CHOICE value as gracefully as they would with an > unrecognized attribute. To avoid problems, the S/MIME -msg spec would > have to state that epochSeconds MUST NOT be used by sending applications.