More cryptographic milestones

• [1977, Merkle, Hellman] construction of a public key cryptosystem based on knapsack problem.
• [1977, Rivest, Shamir, Adleman] construction of a public key cryptosystem based on factoring.
• [1979, Blakley & Shamir] threshold secret sharing schemes.
• [1981, Wegman & Carter] Authentication via hashing
• [1982, Chaum] Anonymous electronic cash, blind signatures
• [1982, Goldwasser & Micali] probabilistic encryption