You found an empty entry. We are still working on this part. Please come back later. >[!read]- Further Reading >[!ref]- References > - R. C. Merkle, Secure communications over insecure channels, Commun. ACM **21**, 294 (1978). > - W. Diffie and M. Hellman, New directions in cryptography, IEEE Transactions on Information Theory **22**, 644 (1976).