[tech] client certificate expiry

mbays mbays at sdf.org
Thu Mar 25 22:44:59 GMT 2021

Does it make sense to give a self-signed client certificate an 
expiration date? I think not, and therefore according to RFC5280 section, notAfter should be set to 9999-12-31 23:59.
=> https://tools.ietf.org/html/rfc5280#section-

The same goes for self-signed server certificates, but I mention this in 
the context of client certs because the notAfter time gives a way to 
fingerprint clients. So it would be good for clients which generate 
client certs to agree on this.
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