Abstract: The concept of information theoretic secrecy offers an approach for providing unconditional data security in several network models. In this talk, we discuss multiterminal ``source" and ``channel" models for secret key generation with public communication. Connections to seemingly-unrelated and well-studied problems that do not involve secrecy requirements, namely multiterminal data compression and channel transmission, will be highlighted. These connections will be illustrated by constructive schemes for specific models. The talk is based on joint works with Imre Csiszar and Chunxuan Ye.