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PKI is the system of digital certificates, certificate authorities, and related infrastructure that enables secure communications on the internet. Every HTTPS website uses PKI - your browser trusts certificates issued by certificate authorities who verify website identity. PKI also enables email encryption, code signing, VPN authentication, and IoT device identity. The quantum problem: PKI uses RSA or ECC signatures for certificates, all vulnerable to Shor algorithm. Migrating PKI to post-quantum cryptography is one of the largest challenges in quantum transition - billions of certificates, complex trust hierarchies, compatibility requirements. The solution: hybrid certificates with both classical and PQC signatures during transition, crypto-agile certificate management systems, and migration planning tools like mCARP to inventory and track certificates.
The entire internet security model depends on PKI. Certificate authorities issue millions of certificates daily. Migration requires coordinated updates across certificate authorities, web servers, browsers, operating systems, and applications. Starting late means facing the quantum cliff - sudden obsolescence when quantum computers arrive.
Every organization using TLS certificates, code signing, device authentication, or email encryption depends on PKI and needs quantum migration planning. Root certificates with 25-year lifetimes issued today must consider quantum threats. Certificate authorities must support hybrid certificates.
Website TLS/SSL certificate management, code signing certificate migration, email encryption certificate updates, IoT device certificate provisioning, VPN certificate authentication, mobile device management certificates
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PKI, public key infrastructure, digital certificates, certificate authority, CA, TLS certificates, SSL certificates, X.509, hybrid certificates, post-quantum PKI, certificate migration