《计算机科学导论》课件Unit 13 Security教程文件.pptxVIP

Unit 13 SecurityOUTLINE13-1 Security Goals13-2 Security Threats13-3 Security Services13-4 Cryptography13-5 Key Terms13-6 Summary13-7 Practice SetDescribe the security goals and the CIA traidUnderstand Security Threats List Security ServicesUnderstand Symmetric-Key Cryptography and Asymmetric-Key CryptographyUnderstand Quantum cryptography and SteganographyUnderstand the concept of the Information Security.OBJECTIVESAfter reading this chapter, you are supposed tobe able to :13-1 Security GoalsInformation SecurityCIA traidInformation SecurityInformation security【信息安全】 is the process of protecting sensitive /wiki/Informationinformation from unauthorized access, modification, inspection, recording, use, disclosure, destruction, or disruption, to ensure its availability【可用性】, confidentiality【机密性】, and integrity【完整性】The traditional information security principles are confidentiality,?integrity?and availability, also known as the?CIA triad【CIA三元组】MalwareMalware【恶意软件】, short for malicious software, is any software that is harmful to a computer user.Malware includes computer?/definition/virusviruses【病毒】,?/definition/wormworms【蠕虫】,?/definition/Trojan-horseTrojan horses【特洛伊木马】, bots, /definition/spywarespyware【间谍软件】, adware, bugs, ransomware 【勒索软件】, rootkit, and other malicious programs.MalwareA virus is a program that is capable of embedding a copy of itself into another program.A worm is similar to virus in that it uses a network to replicate copies of itself onto other computers.MalwareA Trojan horse, commonly known as a Trojan, is a program that appears to be helpful, but actually causes problems on the computer on which it is executing.Spyware is software that aids in gathering information about a person or organization without their knowledge.Security Attackspassword guessing attack【密码猜测攻击】 In this attack, password guessing is performed by repeatedly trying to log in to a system or application using different passwords.phishing attack【钓鱼攻击】 In this attack, users may re