(专业介绍-信息安全)

1、Information SecurityFeb.27.2012School of MathematicsProfession introduction During this time when the Internet provides essential communication among billions of people and is being increasingly used as a tool for commerce, information security becomes a pretty important issue to deal with.Introduct

2、ion-developmentIntroduction-resourcesIntroductionexperts in this fieldAdi ShamirAdi Shamir ( born July 6, 1952) is a famous cryptographer. He is a co-inventor of the RSA algorithm ,he invented differential cryptanalysis and has made numerous contributions to the fields of cryptography and computer s

3、cience.Introductionexperts in this fieldWang Xiaoyun Wang Xiaoyun,Professor of Shandong University, famous cryptographer.She broke the famous ciphers MD5 ,SHA-1,MD4 and RIPEMD in 2004 and 2005 respectively. Information security aims to protect Privacy Integrity Availability Authenticity Non-repudiat

4、ion Introductiontarget There are many aspects of information security, ranging from secure commerce and payments to private communications and protecting passwords. There are two main aspects in the information security specialty. Network Security CryptographyIntroduction-contentCryptography Cryptog

5、raphy is a major security and confidentiality of communications disciplines, and it includes two branches: the cipher code and cipher analysis.Encryption, KeyPlain text Cipher textDecryption, KeyCryptography-show-how Three types of cryptography: Secret key cryptography Public key cryptography Hash f

6、unctionCryptography-TypesCryptography-Types The safety of the cryptography is based on several difficult mathematical problems. These problems wont be solved in a long time, and thats why they are called difficult problems.Cryptography-the Safety Guarantee Cryptanalysis sometimes can get the idea ho

7、w the text is encrypted ,but never get the secret key in the encryption. The Hash Function is irreversible，which means its impossible to get back to the input through the output.Cryptography-the Safety Guarantee Act as the cryptanalysis to break the cryptography systems to find out whether the encryption is safe enough. Improve the safety of the cryptography system without increasing the