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Presented By : O8-SE-59 O8-SE-75 INFORMATION SYSTEM SECURITY
OVERVIEW ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
WHAT IS SECURITY? ,[object Object],[object Object],[object Object]
EXAMPLES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
INFORMATION SYSTEM SECURITY ,[object Object],[object Object],[object Object],[object Object],[object Object]
INFORMATION SYSTEM SECURITY (ISS)?  Security Services Attackers Security Mechanisms Security   Architecture Information System  (file, message) Policies
VULNERABILITY, THREAT, ATTACK ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ISS OBJECTIVES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A CIPHER SYSTEM  ( achieving confidentiality) ciphertext Encryption algorithm Decryption algorithm encryption key decryption key plaintex t plaintext Interceptor Sender (Alice) Receiver (Bob)
ISS IN GENERAL ,[object Object],[object Object],[object Object],[object Object]
CRYPTOGRAPHY ,[object Object],[object Object]
CRYPTOLOGY CRYPTOLOGY CRYPTOGRAPHY CRYPTANALYSIS symmetric-key   asymmetric-key   Block Cipher Stream Cipher Integer Factorization Discrete Logarithm
EXAMPLE ,[object Object],[object Object],[object Object],[object Object],[object Object]
CRYPTOGRAPHY ,[object Object],[object Object],[object Object],[object Object]
CRYPTOGRAPHY ,[object Object],[object Object],[object Object]
SYMMETRIC-KEY SYSTEMS ,[object Object],[object Object],[object Object]
TYPES OF SYMMETRIC CIPHERS ,[object Object],[object Object],[object Object],[object Object],[object Object]
SYMMETRIC-KEY SYSTEMS Locking Unlocking =
ASYMMETRIC-KEY SYSTEMS ,[object Object],[object Object],[object Object],[object Object]
ASYMMETRIC-KEY SYSTEMS (contโ€ฆ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ASYMMETRIC-KEY SYSTEMS (contโ€ฆ) ,[object Object],[object Object],[object Object]
TYPES OF ASYMMETRIC-KEY SYSTEM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ASYMMETRIC-KEY SYSTEMS (contโ€ฆ) Only a key holder can unlock Anyone can lock
CONCLUSION ,[object Object]
[object Object]

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