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Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Cryptography Overview and Pretty Good Privacy Instructor: Joseph DiVerdi,

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Presentation on theme: "Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Cryptography Overview and Pretty Good Privacy Instructor: Joseph DiVerdi,"— Presentation transcript:

1 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Cryptography Overview and Pretty Good Privacy Instructor: Joseph DiVerdi, Ph.D., MBA

2 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Cryptography Basic Parts Plaintext –Human-readable or software-readable message Ciphertext –Plaintext message after modification to obscure it Algorithm –Mathematical operation used to convert plaintext into ciphertext and vice versa Key –Piece of static data which makes an algorithm's transformation unique

3 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Key-Based Encryption

4 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Keys A key is a (very long) series of numbers –It is data only not a program A program is required to encrypt data –Uses a key to create unique encrypted data –Uses a key to "lock" unique encrypted data A program is required to decrypt data –Sometimes the same program used to encrypt –Uses a key to "unlock" unique encrypted data –Can't use just any old key, must be the right one

5 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Symmetric Key Method

6 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Public-Private Key Method Two Different but Related Keys –Called a Key-Pair –One Public Key Shared with the world –One Private Key Not shared with anyone! –There is a definite mathematical relationship between the two keys

7 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Asymmetric Key-Pair Method

8 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Secure Message Transmission

9 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Authenticated Sender

10 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Quantum Cryptography

11 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC Pretty Good Privacy MIT Distribution Center for PGP: –http://web.mit.edu/network/pgp.html International PGP Page: –http://www.cam.ac.uk.pgp.net/pgpnet/ PGP Certificate Server: –http://pgpkeys.mit.edu:11371/

12 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC PGP Tools

13 Cryptography Overview and PGP - Fort Collins, CO Copyright © XTR Systems, LLC PGP Tools

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