# hw10 - Digital Cash, Chapter 11 T&W p. 294 #1. We check...

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p. 294 #1. We check that Test #1 works: = = = = = Then we check that Test #2 works: = = = = g = Then we check that Test #3 works: = = = = p. 294 #2. The discussion in #1 shows that the tests will continue to be valid, hence that coins may be minted and spent, since a coin is not tested except in the three tests to see if it is valid. All coins are made from the publicly available values of the g's and numbers that are otherwise random, except that the same value of x must appear on both sides of the test. Since it is not expected that anyone except the Bank will possess x, no test is made for such a condition. p. 294 #3. We assume that the coin itself is valid. Hence, the test p. 291, 1) checks. The values and are attached as a deposit slip to the coin by the Merchant to try to identify who spent it, in case the Bank discovers that the coin has been spent more than once. Let G be the common value of

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## This note was uploaded on 02/14/2012 for the course MATH 470 taught by Professor Staff during the Spring '08 term at Texas A&M.

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hw10 - Digital Cash, Chapter 11 T&W p. 294 #1. We check...

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