Post-quantum cryptography is the family of encryption and signature algorithms designed to resist attacks by future quantum computers. The algorithms run on today's ordinary hardware.
Key management is the set of practices and systems for creating, storing, using, rotating and retiring cryptographic keys. It keeps encrypted data and digital signatures trustworthy.
Public key infrastructure (PKI) is the system of certificate authorities, certificates and policies that binds public keys to identities. It lets parties trust encrypted connections and digital signatures.
TLS (Transport Layer Security) is the protocol that encrypts and authenticates data travelling between two systems. Typical pairs are a browser and a web server, or two internal services.
A zero-knowledge proof is a cryptographic method for proving a statement is true without revealing the data behind it. For example, it can show someone is an adult without exposing their date of birth.
Encryption at rest and in transit means protecting data with encryption both while it is stored and while it moves across networks. Stolen or intercepted data then stays unreadable without the keys.
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