All news with #forward secrecy tag

Tor adopts Counter Galois Onion (CGO) for relay encryption

🔐 Tor has replaced its legacy tor1 relay encryption with a new design called Counter Galois Onion (CGO) to strengthen circuit traffic confidentiality and integrity. CGO is built on a Rugged Pseudorandom Permutation (RPRP) construction named UIV+ and provides wide-block encryption, tag chaining, per-cell key updates for immediate forward secrecy, and a 16-byte authenticator that removes SHA-1. The change is currently experimental in the C Tor implementation and the Rust client Arti, will be deployed transparently to Tor Browser users, and aims to block tagging and other malleability attacks with only modest bandwidth cost.