Re: [pkix] Managing Long-Lived CA certs
Rob Stradling <rob.stradling@comodo.com> Mon, 17 July 2017 14:49 UTC
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To: "Dr. Pala" <director@openca.org>
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From: Rob Stradling <rob.stradling@comodo.com>
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Date: Mon, 17 Jul 2017 15:49:49 +0100
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Subject: Re: [pkix] Managing Long-Lived CA certs
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Hi Max. The "Private Key Usage Period" extension was present in RFC2459 and RFC3280 (see section 4.2.1.4), but was removed in RFC5280. (Well, mostly removed; the ASN.1 definitions are still in Appendix A.2 ;-) ). On 17/07/17 15:19, Dr. Pala wrote: > Hi PKIX, > > I have a small question for the list regarding long-lived CA > certificates. Especially in the context of device certificates, we often > see the use of extra long-lived certificates for Root and Sub CAs (e.g., > 35+ years) combined with limited key sizes (e.g., p256). > > Until we have a supported mechanism for reprovisioning devices (...), > one possible solution for limiting the exposure of the private key would > be to have a scoped certificate issuance period. > > What I am thinking about would be adding an extension that says: "This > CA can issue certificates from up to 5 years from the validFrom, after > this, just use it to provide revocation information". This might provide > some protection in case the CA key is compromised after the initial 5 > years of validity (e.g., certificates issued after that date shall be > rejected). > > Does such extension exists today ? If not, could this be some work for > LAMPS/SPASM WG ? > > Cheers, > Max > > -- > Best Regards, > Massimiliano Pala, Ph.D. > OpenCA Labs Director > OpenCA Logo > > > _______________________________________________ > pkix mailing list > pkix@ietf.org > https://www.ietf.org/mailman/listinfo/pkix > -- Rob Stradling Senior Research & Development Scientist COMODO - Creating Trust Online
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
- [pkix] Managing Long-Lived CA certs Dr. Pala
- Re: [pkix] Managing Long-Lived CA certs Rob Stradling
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
- Re: [pkix] Managing Long-Lived CA certs Erik Andersen
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
- Re: [pkix] Managing Long-Lived CA certs Erik Andersen
- Re: [pkix] Managing Long-Lived CA certs Carl Wallace
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
- Re: [pkix] Managing Long-Lived CA certs Santosh Chokhani
- Re: [pkix] Managing Long-Lived CA certs Carl Wallace
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
- Re: [pkix] Managing Long-Lived CA certs Peter Gutmann
- Re: [pkix] Managing Long-Lived CA certs Erik Andersen
- Re: [pkix] Managing Long-Lived CA certs David A. Cooper
- Re: [pkix] Managing Long-Lived CA certs Peter Gutmann
- Re: [pkix] Managing Long-Lived CA certs David A. Cooper
- Re: [pkix] Managing Long-Lived CA certs Peter Gutmann
- Re: [pkix] Managing Long-Lived CA certs Erik Andersen
- Re: [pkix] Managing Long-Lived CA certs swilson
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
- Re: [pkix] Managing Long-Lived CA certs Anders Rundgren
- Re: [pkix] Managing Long-Lived CA certs Denis
- Re: [pkix] Managing Long-Lived CA certs Carl Wallace
- Re: [pkix] Managing Long-Lived CA certs EG Giessmann
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
- Re: [pkix] Managing Long-Lived CA certs Dr. Pala
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