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Archive of posts regarding https

Design of the CRLite Infrastructure

Published 2020-12-01

Firefox is the only major browser that still evaluates every website it connects to whether the certificate used has been reported as revoked. Firefox users are notified of all connections involving untrustworthy certificates, regardless the popularity of the site. Inconveniently, checking certificate status sometimes slows down the connection to websites.... [read more]

Auditing the CRLs in CRLite

Published 2020-11-27

Since Firefox Nightly is now using CRLite to determine if enrolled websites’ certificates are revoked, it’s useful to dig into the data to answer why a given certificate issuer gets enrolled or not.

Ultimately this is a matter of whether the CRLs for a given issuer are available to... [read more]

Querying CRLite for WebPKI Revocations

Published 2020-11-26

Firefox Nightly is now using CRLite to determine if websites’ certificates are revoked — e.g., if the Certificate Authority published that web browsers shouldn’t trust that website certificate. Telemetry shows that querying the local CRLite dataset is much faster than making a network connection for OCSP, which makes... [read more]

CRLite: Speeding Up Secure Browsing

Published 2020-01-21

CRLite pushes bulk certificate revocation information to Firefox users, reducing the need to actively query such information one by one. Additionally this new technology eliminates the privacy leak that individual queries can bring, and does so for the whole Web, not just special parts of it.

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The End-to-End Design of CRLite

Published 2020-01-09

CRLite is a technology to efficiently compress revocation information for the whole Web PKI into a format easily delivered to Web users. It addresses the performance and privacy pitfalls of the Online Certificate Status Protocol (OCSP) while avoiding a need for some administrative decisions on the relative value of one... [read more]

The State of CRLs Today

Published 2017-08-18

Certificate Revocation Lists (CRLs) are a way for Certificate Authorities to announce to their relying parties (e.g., users validating the certificates) that a Certificate they issued should no longer be trusted. E.g., was revoked.

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Analyzing Let's Encrypt statistics via Map/Reduce

Published 2017-05-16

I’ve been supplying the statistics for Let’s Encrypt since they’ve launched. In Q4 of 2016 their volume of certificates exceeded the ability of my database server to cope, and I moved it to an Amazon RDS instance.

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Early Impacts of Let's Encrypt

Published 2016-02-19

During the months I worked in Let’s Encrypt’s operations team I got fairly used to being the go-to man for any question that a database query could solve.

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