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Resumé:
Jim Serwer
Software Consultant
408-985-6615
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Cryptography


RSA Public Key Algoritm

I am the creator of a cryptography tool called SignetSure. If Cryptography interests you, please visit the SignetSure web site and download SignetSure.

SignetSure is a developer tool which protects files from malicious alteration using digital signature technology. It provides a simple GUI for creating Public/Private keys and for signing files. A software developer can validate a signed file with a single API call. To validate a file, the recipient does not need to download PGP or even know that his files are being protected.

I wrote most SignetSure code myself; a few components I found on the Web. I found on the web an implementation of the SHA hash algorithm, and a package that performs long-number arithmetic. Then I modified the arithmetic package for speed.

After I failed to find any open source code which implements the RSA public key encryption algorithm, I implemented it myself. I implemented both the key generation and signing done at development time, and the redistributable validation library called at run time.

I coded from the mathematical proof of the RSA algorithm, without benefit of sample code.


Other Cryptography Algorithms

(Each time I start a new contract, I must learn new material. Some material is unique to the client's product, and some is of a general nature. It is my firm policy NOT to charge clients for time I spend learning skills of a general nature.)

Cryptography is a large topic that extends way beyond the RSA public key algorithm. I do not charge for my time to learn other crytographic algorithms. If I have to learn Triple DES (Data Encryption Standard), it may cost me more, but it should not cost you more.


Educational background

I have a masters degree in Mathematics and work experience in numerical analysis and scientific calculation.


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