Thursday, February 16, 2017

private-key lifetime reccommendations

For SSL certificate, the MAX life-time   that's recommend by  NIST is for 3years

reference Nist SP 800 series or  the CA/browser committee

Yes, threes years is all that we get , and that does not cover all certificates types.

This is why no  CA will sign CSRs for more than 3 years { 1095 days }, so if you need a ssl certificate ,  that's certificate would need  a life expectancy of 1095 or less days.

Also you will never find a CA  who will not sign a sub-key longer than it's own key
( this should be obvious  )

You will find that some CA follow the 39month  max lifetime and most EV certificates are issued at a max of 1 or 2 years depending on their policies. And yes it's all about the money ;)

The CA and intermediates could have lifetimes of between 10-30 years in life-time.

 So if you want a certificate signed longer, you need your own private-CA .

Ken Felix
NSE ( network security expert) and Route/Switching Engineer
kfelix  -----a----t---- socpuppets ---dot---com
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