OUTLINEo Part 1: Contexto Part 2: Introduction to Information Securityo Part 3: The Foundation of Cryptographyo Classical Cryptography Systemo Symmetric Cryptography System口 DESAESoAsymmetric CryptographySystemRSAECCo Hash and Message Authentication Codeo Digital Signatureo Key Distribution and Management
OUTLINE Part 1: Context Part 2: Introduction to Information Security Part 3: The Foundation of Cryptography Classical Cryptography System Symmetric Cryptography System DES AES Asymmetric Cryptography System RSA ECC Hash and Message Authentication Code Digital Signature Key Distribution and Management
PART 1Context
PART 1 Context
CONTEXT---SECURITY THREATS OFINFORMATION SYSTEMVirus(Shockwave)oWorm(RedCode,Blaster,飞客蠕虫Conficker)o Trojan Horse(Trojan_Geral.LOT)o Malware(malicious software, e.g. malicious APP)o Bot/Botneto Vulnerability(SQL Injection, Buffer Overflow)oWebsite Defacedo Phishingo: Spamo DoS/DDoSoDisclosureofPrivateInformationo Non-Authorized Accesso Domain Name Hijacking
CONTEXT-SECURITY THREATS OF INFORMATION SYSTEM Virus(Shockwave) Worm(RedCode, Blaster,飞客蠕虫Conficker) Trojan Horse(Trojan_Geral.LOT) Malware(malicious software, e.g. malicious APP) Bot/Botnet Vulnerability(SQL Injection, Buffer Overflow) Website Defaced Phishing Spam DoS/DDoS Disclosure of Private Information Non-Authorized Access Domain Name Hijacking
CONTEXT---SECURITY SITUATION2015年第35期国家互联网应急中心8月24日-8月30日网络安全信息与动态周报CNERTICC本周网络安全基本态势优差中良境内够染网络病毒的主机数量·73.74万+9.6%境内被算改网站总敷-281636.6%其中政府网站数量-467.0%境内被植入后门网站总数-393723.1%-173其中政府网站数量2.4%针对境内网站的仿冒贡面数量-4503+23.4%新增信息安全漏洞数量-21919.7%-65其中高危漏洞数量23.5%
CONTEXT-SECURITY SITUATION
CONTEXT---SECURITY SITUATION本周网络病毒活动情况本周境内感染网络病毒的主机数量约为73.74万个，其中包括木马或價尸程序19.3%60.16万境内被木马或被僵户程序控制的主机约60.16万以及境内感染飞客飞客虫94.4%（conficker）虫的主机约13.5813.58万万
CONTEXT-SECURITY SITUATION