Cryptography is the study of secure communications techniques that allow only the sender and intended recipient of a message to view its contents. The term is derived from the Greek word kryptos, which means hidden.

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00:00 Why do We Need Cryptography?
00:45 Problems
01:22 What is Cryptography?
02:12 Solution Strategy
03:15 Features of Cryptography
04:52 Basic Definitions
07:50 Cryptography Around Us
08:46 E-Banking
09:25 Https
10:20 Gmail
11:18 Disk Encryption
12:25 Storing Passwords
14:15 Methodology in Cryptography
16:05 Conventional Encryption
17:02 Cryptography
23:52 Strength of Cryptosystem

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