AES Encryption and Decryption Programming and Documentation

We have an encryption and decryption centred project, that follows the step below. (1) Make a Webform i.e. <input name="LastName" type="text" value=”Doe” (2) Convert the web to a string i.e. firstname=John&LastName=Doe (3) Encrypt the string using 128 Bit AES logic and keys provided. i.e. a1gsh163hey2734937hg6dhif84jdjfufi9844ndn8sg3yjd98dijnd (4) Post encrypted data and ID to URL i.e. [login to view URL] RESPONSE FROM SERVER When above sample is posted, server will also return data in encrypted format i.e. a1gsh163hey2734937hg6dhif84jdjfufi9844ndn8sg3yjd98dijnd (5) Decrypt Received encrypted data use the keys you already have, to decrypt the received encrypted data and display the content What we need from this illustration (1) Programming of each bit in different languages, (2) Documentation of the steps to describe how to do it, like in API document