Differentiate the following terms : a) Link and end to end encryption; b) Public key certificate and elliptic curve.
Subject Computer and Network Security
NU Year Set: 4.(d) Marks: 5 Year: 2014

End-to-end encryption, sometimes abbreviated as E2EE, is a system for secure transfer of information where data is encrypted and decrypted only at the endpoints, no matter how many points it touches in the middle of its virtual journey. This type of encryption is a great way to provide secure, private communication.

Link encryption differs from end-to-end encryption mainly in the fact that it encrypts and decrypts all traffic at every point, no just at the endpoints. With this approach, all data is in an encrypted state while it travels on its communication path. However, when it reaches a router or another intermediate device, it gets decrypted so that the intermediator knows which way to send it next.


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