NSA paper, 1996: How To Make A Mint: The Cryptography of Anonymous Electronic Cash.

Do you have a link to a place where this paper can be read that's hosted by a credible and verifiable source?

Quote

Anonymous: Fried, Frank got NSA's permission to make this report available. They have offered to make copies available by contacting them at <21stCen@ffhsj.com> or (202) 639-7200. See: http://www.ffhsj.com/bancmail/21starch/961017.htm
Source: http://groups.csail.mit.edu/mac/classes/6.805/articles/money/nsamint/nsamint.htm

As you can see it is hosted at MIT, I believe it is a credible source.

MIT Computer Science and AI Laboratory
http://www.csail.mit.edu/
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Project MAC ("Switzerland"), MIT Project on Mathematics and Computation
http://groups.csail.mit.edu/mac/projects/mac/
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Class: MIT 6.805/STS085: Ethics and Law on the Electronic Frontier, Special topic for Fall 13: Foundations of Internet Public Policy
http://groups.csail.mit.edu/mac/classes/6.805/
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NSA Mint
http://groups.csail.mit.edu/mac/classes/6.805/articles/money/nsamint/nsamint.htm