Definition
Post-quantum cryptography, or PQC, refers to cryptographic algorithms designed to be secure against attacks from both classical and quantum computers. These new algorithms aim to replace current public-key cryptography methods that are vulnerable to quantum computing's immense processing power. In practice, PQC involves implementing these new mathematical approaches within existing security protocols and systems to ensure future data protection. This is crucial for protecting sensitive information like financial transactions and personal data from emerging quantum threats. For example, migrating secure communication channels like TLS to PQC algorithms will safeguard internet traffic. Unlike current cryptography which relies on mathematical problems intractable for classical computers, PQC addresses problems intractable for quantum computers. You will encounter PQC concepts in domains like cybersecurity architecture and on exams such as CompTIA Security+ and CISSP.