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Tool: Cryptography
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Go to: http://www.mbackus.com/mikesmathtools/cryptography.xls (opens a new window)
Description: Students encode and decode a secret message using matrices.
Technology Type: Excel 
Guide: User's Guide (opens a new window)
Author: Michael Backus
Language: English 
Cost: Does not require payment for use

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Courses: Algebra II Solving systems of equations, Matrices