密码编码学与网络安全原理与实践_ch01 预览.pptxVIP

Lecture slides by Lawrie Brown for “Cryptography and Network Security”, 5/e, by William Stallings, briefly reviewing the text outline from Ch 0,and then presenting the content from Chapter 1 – “Introduction”.Cryptography and Network Security Overview & Chapter 1Fifth Edition by William StallingsLecture slides by Lawrie Brown This quote from the start of Ch0 ”Reader’s Guide” sets the scene for why we want to study these issues.Chapter 0 – Reader’s GuideThe art of war teaches us to rely not on the likelihood of the enemy"s not coming, but on our own readiness to receive him; not on the chance of his not attacking, but rather on the fact that we have made our position unassailable.—The Art of War, Sun Tzu The material in this book is organized into four broad categories:? Cryptographic algorithms: This is the study of techniques for ensuring the secrecy and/or authenticity of information. The three main areas of study in this category are: 1. symmetric encryption, 2. asymmetric encryption, and 3. cryptographic hash functions, with the related topics of message authentication codes and digital signatures.? Mutual trust: This is the study of techniques and algorithms for providing mutual trust in two main areas. First, key management and distribution deals with establishing trust in the encryption keys used between two communicating entities. Second, user authentication deals with establish trust in the identity of a communicating partner.? Network security: This area covers the use of cryptographic algorithms in network protocols and network applications.? Computer security: In this book, we use this term to refer to the security of computers against intruders (e.g., hackers) and malicious software (e.g., viruses). Typically, the computer to be secured is attached to a network and the bulk of the threats arise from the network.RoadmapCryptographic algorithms symmetric ciphers asymmetric encryption hash functionsMutual TrustNetwork SecurityComputer Security Throughout