Secure Voice Encryption

1
Secure Voice Encryption

• Jared Poe
• COSC 4553
• Spring 2008
• Assignment 11

2
An Overview

• Brief History
• Basic Mechanics
• Why it is Needed
• Example Application
• Uses of Secure Voice
• Advantages Disadvantages
• An Inside look at my thoughts

3
History

• Pre-1940s Voice Scramblers
• 1940s SIGSALY X-Ray The Green Hornet
• 1960s KY-3
• 1980s STU-III
• 1990s - MELP
• 2000s MELPe, STE, SCIP

4
Basic Mechanics
5
Why it is Needed

• Radio Broadcasts
• Wiretapping
• Landline Communication
• Wireless Communication

6
Example Application

• CryptoPhone Cellular and land
• L3 OMNI voice data
• Zfone - VOIP

7
Uses of Secure Voice

• Department of Defense Applications
• FBI, CIA, NSA, and Police actions
• Corporate Communication
• Private Use

8
Advantages Disadvantages

• Used mostly for time sensitive data so once
  encryption is broken the data may be useless.
• Radio broadcast can be received and recorded by
  anyone.

9
My Thoughts

• Mainly interested in the History and Development
• Fascinating that sound waves can be made
  electronic for encryption

10
Conclusion

• Developed for Military and National Security use
• Still mainly used in government applications
• Commercial products for private use are available.

11
References

• http//history.sandiego.edu/gen/recording/sigsaly.
  html
• http//www.nsa.gov/publications/publi00020.cfm
• http//www.nsa.gov/publications/publi00019.cfm
• http//www.tscm.com/STUIIIhandbook.html
• http//www.cryptophone.de/qa/index.html
• http//zfoneproject.com/
• http//cwr.iwm.org.uk/server/show/ConWebDoc.826/vi
  ewPage/5
• http//en.wikipedia.org/wiki/Secure_voice