3 ms·
An analysis of CRL sizes from various CAs
- new23d 2y agoWe collected some data on the viability of only CRLs as the future (phasing out OCSP) - motivated by Let's Encrypt's announcement today [1]. Data is on CRL availability, number of entries, expiry & refresh times, etc. from various x509 leaf server SSL certificates. [1] https://news.ycombinator.com/item?id=41046956 https://news.ycombinator.com/item?id=41046956
- new23d 2y agoSome initial observations: • Google's CRLs from the same intermediate CA (same public key) have different URLs and different content when pulled from different hosts (google.com, youtube.com). • DigiCert has sharded according to 'assurance' class, algorithm, year and acquisition's name. • Sectigo also has sharded according to 'assurance' class [1]. • GlobalSign has sharded by the yearly quarter presumably. • HTTP Cache-Control maxage (or s-maxage), 'Expires' and 'Next Update' within the CRL file are not in sync. • Some CAs other than Let's Encrypt also do not publish CRL URLs in the leaf certificates. [1] https://www.sectigo.com/knowledge-base/detail/Sectigo-Intermediate-Certificates-ECC/kA01N000000rfGE https://www.sectigo.com/knowledge-base/detail/Sectigo-Interm...
- threesevenths 2y agoWhat analysis was done or are we just talking about the data gathering?
- new23d 2y agoWe'll be working on that in the coming days. Thought the data at this point was a good start.