4 History of Cryptography

4 History of Cryptography - CET 4663 Cryptography Part 1...

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CET 4663 Cryptography Part 1 History of Cryptography
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What are we going to cover? We will concentrate on the use of cryptography Not the inner workings But we will cover some of the theory Nothing to deep into the math
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Goals of Cryptography Cryptography addresses three goals Confidentiality Integrity Authentication Indirectly it can be used to aid Non-repudiation Secure multi-party computing Anonymity
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Private- vs. Public-Key Crypto Two fundamentally different types of crypto Private-key / Shared-key / Symmetric-key Public-key Private-key has been around a very long time Public-key has its origins in the 1970s
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Private-key Cryptography The communicating parties share a secret That secret is used to encrypt the conversation If you know the secret, you know the data If you don't know the secret, you don't know the data
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Problem #1 The private-key (or shared-key) must be shared Both parties must have the key prior to starting the conversation
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This note was uploaded on 04/24/2011 for the course CET 4663 taught by Professor Staff during the Fall '08 term at University of Central Florida.

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4 History of Cryptography - CET 4663 Cryptography Part 1...

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