create a system that digitally signs (encryption) a document/message, Verifies(decryption) that document

In Progress

Implementation of Digital Signature on Separate Systems.

(I posted this earlier but I didn't check the pricing range and I made mistake by going with the default and I'm sorry for anyone that has already bid on it with that budget range but I can't pay what I don't have. I'm just a student in a 3rd world country)

There are two main components of the system,

1. the encryption/signing component(system) which signs and encrypts a message or file (video, audio, graphic). It's a separate system on its own and has its own interface that enables the user to write a message and upload a file to digitally sign.

2. the decryption/verification part of the system, also a separate system on its own and that allows the user to decrypt and verify(validate) that the document has not been tempered with. also has an applet GUI.

3. there is also the need for a third component to the system, the compression algorithm; this is for the audio and video files that may be too heavy, this is why we need a compression algorithm that compresses the files before signing.

1 and 2 must be in java and made as straight-forward as possible. the GUI should also be simple to navigate .

3-compression is just an algorithm that shows how the compression is done.

Most of the java codes for the digital signature are online but are not in applet form.

the GUI for the Signer is included, its the same for the verifier. There is no need for the compression and decompression buttons since the compression is going to be on a separate algorithm. the system should be able to sign a file as well as the message written on the message box.

Skills: Algorithm, Java, Javascript

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About the Employer:
( 1 review ) Melaka, Malaysia

Project ID: #2692853

Awarded to:


Dear sir, Thanks for posting the project. I'm quite intrigued by your development project. I have developed many Digital Signature System. I have a All Library for Digital Signature. I will give you the best resul More

$200 USD in 15 days
(1 Review)

6 freelancers are bidding on average $148 for this job


Can do it but not with 90$ ;-)

$500 USD in 15 days
(80 Reviews)

I have experience to develop a application for data encryption. I developed one application on steganography. So if u r interested then contact me.

$80 USD in 3 days
(0 Reviews)

Hi, I have implemented such such functionality. Let me know further details if you are interested. Cheers.

$90 USD in 7 days
(0 Reviews)

Hello,I will do this project as i have done varios study in compression,And i am a java developer ,so it is of my left hand

$75 USD in 10 days
(0 Reviews)

Have actually implemented the digital signature stuff before for an enterprise client. should be able to help you out.

$350 USD in 4 days
(0 Reviews)

Custom software development: w w w . The Administrator removed this message for containing contact details which breaches our Terms of Service . i o

$90 USD in 1 day
(0 Reviews)