Some secure web services (like payments) are using hashed Authorization headers.

One example is Worldline, who states: "In short, our Server API authentication mechanism uses hashes over a number of headers (called Signature Contents) and your secret API key to verify authenticity. The hash algorithm used is HMAC-SHA256."

The example can be found here: https://apireference.connect.worldline-solutions.com/s2sapi/v1/en_US/json/authentication.html?paymentPlatform=ALL

For this reason, and to be able to access highly secure online services, it would be good to add a "Crypto" module in FlowScript to do these types of encryptions.

The Crypto module could then support encryption and decryption of commonly used algorithms.