The InfoSec Handbook: An Introduction to Information Security by Rao Umesh Hodeghatta & Nayak Umesha

Author:Rao, Umesh Hodeghatta & Nayak, Umesha [Rao, Umesh Hodeghatta]
Language: eng
Format: epub
ISBN: 9781430263821
Publisher: Apress
Published: 2014-09-01T21:00:00+00:00

Figure 8-4. Symmetric Key Distribution Center

Asymmetric Key Cryptography

There are two problems with symmetric key cryptography:

Distribution of key – Secret key sharing among senders and receivers. If there are n parties involved in the communication then n(n-1) keys to be distributed. Managing this many keys is another problem.

Authenticity – Trust and Authenticity of two parties.

In 1976, Diffie and Hellman at Stanford University came up with a new method to solve both the problems of symmetric cryptography that changed the world of cryptography and digital communication radically. This new method is called Public Key Cryptography also known as Asymmetric Key Cryptography.

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