Develop encryption plugin for resourcespace.

I have an existing installation of resourcespace ( [login to view URL] ) customized for my company. I want someone who can help me to design a plugin for resourcespace. Details of the plugin : In the search page, where the resources are shown in a gallery format, the existing system shows a checkbox, a preview icon and a mail-to icon, for each of the resources. I want to add an extra custom button that would enable me to encrypt that resource. When a user clicks on this icon, he should be prompted with a popup where he would have to enter a key / password. On clicking on submit that specific resource would be encrypted using the binary i would provide. A seperate table needs to be maintained which will contain the resource ID and the encryption key. Interested people may contact me for additional details. Attached are the basic ideas for what i want