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Note

The SHA-1 sun has set.  Certificates with a SHA-1 signature are no longer available from UW CA.


UW CA began issuing SHA-2 certificates by default on April 27, 2016.  SHA-1 certs can be requested by emailing help@uw.edu.  Requests will usually be granted as long as the validity period of the certificate falls in the ranges below.  Since a SHA-1 collision has been demonstrated as of February 2017, we may ask for approval from the the owner of the resources you are accessing before granting the request.  

 


Year Cert IssuedValidity Period
20171 year from issue date
2018<= 6 months from issue date
2019 (before May 1)<= 3 months from issue date

UW CA will not issue SHA-1 certs after May 1, 2019.