Cryptography | Prof : Mahavir Jhawar
● Cryptography is the study of secure techniques for communication
between devices or more.
● We use cryptography almost everyday to login into accounts or to
verify applications
● Packets follow a certain path through different channels to receive or
fetch information
● Devices along the channels conduct some inspection to make sure
the packets are going the right direction
● They preserve confidentiality, asking for credentials
● The packet should not have any private information
● Encryption is a big part of cryptography
● Devices can be attacked or controlled to misdirect packets to wrong
directions. Ex : A fake website is fetched
● Cryptography verifies the authenticity of a website. The lock near the
URL is displayed once it is verified using https or tls/ssl encryption.
● Using a secret key, u can sign electronic documents, the sign would
be a unique set of numbers and letters
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