I think it would require some programming in jmeter itself. I think you'd have to write or modify a jmeter sampler in order to do the encryption and decryption inside of jmeter.
It might be easier to modify your API to include an unencrypted test API, but you'd have to validate the encryption bits some other way. It might also be easier to use a tool that automates a session in a web browser, assuming that's where the data from your API is used. -- Bruce Ide [email protected]
