Paul Hoffman wrote:
> Let's talk specifics. The Verisign "Class 3 Public Primary Certification
> Authority", which is widely used to create popular SSL certs on the
> Internet (see <https://www.amazon.com/>), has a 1024-bit RSA key and has
> an expiration date of Aug 1 23:59:59 2028. Yes, that's a bit over 20
> years from now.

That is correct; however, the CAs are not unaware of the NIST guidelines 
on key length. I suspect that these 1024-bit roots will be deprecated 
and eventually removed long before 2028.

For example, the EV guidelines state that no certificate with less than 
2048-bit keys may be used in an EV certificate chain after 31st December 
2010, which I believe was chosen because it's the end of the recommended 
time for stopping using 1024-bit keys set by NIST.
(Page 70 in guidelines v1.1)

Gerv
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