This book constitutes the refereed proceedings of the Second Internati onal Information Security Workshop, ISWF99, held in Kuala Lumpur, Mala ysia in November 1999. The 23 revised full papers presented were caref ully reviewed and selected from 38 submissions. The book is divided in topical sections on electronic money; electronic payment and unlinkab ility; secure software components, mobile agents, and authentication; network security; digital watermarking; protection of software and dat a; key recovery and electronic voting; and digital signatures.