Cryptographic and signed message exchange / Homework / Java

In this task you have to do two main things. They are bound together, but presented separately for the sake of clear presentation: a) Implement a network protocol which provides both secrecy and lefts behind a “prove?? in the form of signature b) Register your own personal official key certificate on the key server, get another certificate, receive a document and sign for it. Receive and signing for received document are done with network protocol from a). The received document will be generated uniquely for each student and is counted as a part of submission. Here you have to do an official key distribution in a very specialized way. That means that the keys must be signed by those who “own?? them, i.e. the owners who have the access to the private keys, and that there is public common place to leave and pick up those keys (i.e. this requires a key server, that we will provide for testing). Complete description of this task can be found in PDF format (se attachment). IMPORTANT !!! Before you post ANY bid please make sure that you R-E-A-D task that is included in attachment, that you fully and completely understand what is needed to be done! All bids with text like "I'm coder, I can do this. Best regards" will be rejected!!! ## Deliverables IMPORTANT !!! Before you post ANY bid please make sure that you R-E-A-D task that is included in attachment, that you fully and completely understand what is needed to be done! All bids with text like "I'm coder, I can do this. Best regards" will be rejected!!! 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). ## Platform Java English