Interactive Proofs, Zero-knowledge and Secure Computation:
Links
Zero-Knowledge
Zero-knowledge protocols and small systems
bsy's Explanation of Zero Knowledge Proofs
What are ZK proofs?
Helger Lipmaa's zero-knowledge links
Papers on Zero-Knowledge by Oded Goldreich
Cryptology and Information Security Group Research Project: Zero-Knowledge Proofs
Zero-Knowledge guarantees anonymity for browser users
Zero-Knowledge Password Proofs
Secure computation
BRICS course
Helger Limpmaa's
multiparty computation
links to numerous documents on the subject