Implement the two stream cipher modes (CFB and OFB) using DES and AES. You can use any existing cryptography toolkit for your ciphers of choice. A good candidate is the C++ library called Crypto++ toolkit. You can compare the results of your implementation against the built-in mode in the toolkit. You may use any language that you are comfortable with, as long as you can find an appropriate cryptography library. You cannot use the built-in CFB or OFB mode. If the toolkit requires specifying a particular mode, then you can use ECB mode and implement CFB and OFB modes. 1. User must be able to select the cipher, mode and the size (1, 8 or 64) that she wants to use. 2. The program must randomly generate the initial planitext block and the key and display the encrypted output. Optionally, it must be able to read the key and plaintext from a file. 3. User must be able to change the key and/or plaintext and see the resulting encrypted data.
1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.
2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables):
a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.
b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.
3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).
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