Public-key exchange

Merkle’s puzzles, Diffie-Hellman key agreement, and RSA.

Merkle’s puzzles: the first public-key exchange (1974-1978)

Merkle's puzzles: the first public-key exchange (1974-1978)

Diffie-Hellman: agreeing on a secret over a public channel (1976)

Diffie-Hellman: agreeing on a secret over a public channel (1976)

RSA: a public trapdoor (Rivest, Shamir and Adleman 1978)

RSA: a public trapdoor (Rivest, Shamir and Adleman 1978)