This book constitutes the thoroughly refereed post-proceedings of the First International Conference on Security in Pervasive Computing held in Boppard, Germany in March 2003. The 19 revised full papers presented together with abstracts of 4 invited talks and a workshop summary were carefully selected during two rounds of reviewing and improvements. The papers are organized in topical sections on location privacy, security requirements, security policies and protection, authentication and trust, secure infrastructures, smart labels, verifications, and hardware architectures.