Post-Quantum Cryptography for DKIM, PGP, and S/MIME: Quantum Threat to Email Security
Security Boulevard, Tuesday, February 17th, 2026
Quantum computers won't break the internet tomorrow. but they will break your email security sooner than you think.
Today, cybercriminals and state-sponsored groups are quietly collecting encrypted emails in bulk. They know they can't crack the encryption today. That's fine. They don't need to. They're playing the long game. This tactic has a name: Store-Now-Decrypt-Later (SNDL).
Attackers capture your encrypted emails today and wait for the moment when quantum computers become powerful enough to crack RSA and ECC. And suddenly, everything you thought was secure becomes an open book.
Your business contracts, personal conversations, financial approvals, and customer data can all be exposed in one future wave of mass decryption.