A Post-Quantum Future for Let's Encrypt

Let's Encrypt is pursuing Merkle Tree Certificates to enable post-quantum authentication in TLS. MTCs provide post-quantum security without compromising speed or reliability. The approach targets authentication threats from cryptographically relevant quantum computers. The plan addresses a gap in post-quantum cryptography where authentication was considered less urgent than encryption. The strategy focuses on real-time signature forging, not retroactive decryption.