My company is developing a standalone, offline Flex/AIR application. When users of the Flex/AIR app. want to activate the application, we will send them an activation file that contains an encrypted string. The string will hold the unique set-up data for the specific copy of the Flex/AIR app. The activation file will need to be generated on our central system which is written in ColdFusion. The Flex/AIR application must read the file and decrypt the string.
Are there any encryption/decryption options that are compatible with ColdFusion 8 and Flex 4?
P.S. The Flex/AIR app. runs offline, so I am not referring to encryption of communications between a ColdFusion server and Flex.