From Deep Sky Technologies:
The CODEC component consists of two methods for the creation of MD5 digests. CODEC_Encode_MD5_x creates a properly formatted MD5 digest directly from a supplied 4D text value. CODEC_Encode_MD5_z creates a properly formatted MD5 digest directly from a referenced 4D BLOB value. Both methods are immediately available for use upon installing the CODEC component. No plugins, external documents, or initialization is needed to begin using the methods. And, all of the code in the CODEC component is set up to handle even the most stringent 4D Compiler settings (e.g. All Variables are Typed).