R2r Root Certificate Guide

The most famous example is the cross-certification from the early 2000s, though those were typically CA-to-CA, not pure root-to-root. A purer example exists in the Federal Bridge Certificate Authority (U.S. government), where multiple agency roots cross-certify with the Bridge, creating a mesh. At the extreme, two agency roots could directly cross-certify — a true R2R.

: Locate R2RCA.cer on your computer and double-click it. r2r root certificate

: When an organization decides to replace its long-standing root (due to expiry, compromise, or compliance), it cannot simply yank the old root. Millions of devices have it embedded. The solution: issue an R2R certificate from the old root to the new root. The new root now inherits the old root’s trust network. Over years, as devices update, the old root can be retired. The R2R is the bridge between two eras. The most famous example is the cross-certification from