Let's Encrypt Plans Post-Quantum Security with Merkle Tree Certificates
By
SGran
Sesame, salt, and substance. A flagship bake.
Summary
Let's Encrypt is planning to adopt Merkle Tree Certificates (MTCs) as a post-quantum security solution for Web PKI. The article explains that while encryption has been the primary focus of post-quantum cryptography discussions, authentication is becoming an increasingly urgent problem as quantum computing advances. MTCs offer a way to add post-quantum authentication to the web without compromising the speed and reliability of TLS. The organization outlines its roadmap and rationale for pursuing MTCs as the key to a post-quantum secure future for web certificates.
Key quotes
· 4 pulledLet's Encrypt is committed to a post-quantum-safe Web PKI.
The path we're planning to take is Merkle Tree Certificates ('MTCs'), a new approach that adds post-quantum authentication to the web without sacrificing the speed and reliability that have made TLS universal.
An attacker who records encrypted traffic today might be able to decrypt it years from now once quantum computers can break the underlying math.
A quantum computer needs to forge a signature in real time, not retroactively, so threats to authentication hinge on the existence of a cryptographically relevant quantum computer (CRQC).
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