Antonino (Tony) Mione (antonino.mione@sunykorea.ac.kr):
There is no required course text. Lecture notes are a primary source of information and should be reviewed before lectures.
Additionally, consider using the following recommended references.
Recommended text 1: Information Security, 2nd Edition
This book provides a solid background in a number of areas in computer security including cryptography, digital signatures, firewalls, software security, and operating security among other topics.
Recommended text 2: Security Engineering: A Guide to Building Dependable Distributed Systems, 2nd Edition