Modern businesses are currently enjoying the numerous benefits brought about by the installation of new technology throughout their information processing systems. However many of these benefits can be seriously jeopardised, or even lost, if the issue of computer security is not addressed from the very outset. Computer Security is the first really practical guide to planning and implementing a comprehensive company security policy. Concentrating on the standards of confidentiality, integrity and availability as set out in the recent DTI guidelines, this book builds upon and guides the reader through these standards by looking at practical management issues, as well as the technical solutions, which need to be combined for a truly effective security policy. Written in a clear, concise and straightforward style it holds the view that prevention is better than cure by taking the reader, step-by-step, through the entirety of computer security; from defining policy through to its implementation and practice. The second chapter of the book is particularly valuable as it provides a blueprint security policy, the cornerstone of the computer security structure, that can be adopted by any company as a definitive policy document.