Cryptography and Security
Your browser does not support the HTML5 canvas tag. Cryptography is the art and science of achieving security by encoding messages to make them non-readable. Cryptanalysis is the technique of decoding messages from a non-readable format back to readable format without knowing how they were initially converted from readable format to non-readable format. Cryptology is a combination of cryptography and cryptanalysis. Principles of Security:- 1)Confidentiality 2)Integrity 3)Authentication 4)Access control 5)Availability 6)Non-repudiation 7)Ethical and legal issues Types of attacks:- 1)General attacks-Criminal attacks,publicity attacks,legal attacks 2)Technical view-a)Theoretical concepts- I)Passive attacks-i)release of message contents ii)traffic analysis II)Active attacks-i)Interception,ii)Fabrication,iii)Modification,iv)Interruption 3)Program attack- a)Virus- A virus is a computer program that attaches itself to another legitimate program and causes damage to the...
