The term nonproprietary is identified in base64 scheme by the sequence bm9ucHJvcHJpZXRhcnk=, while the MD5 signature is equal to 91e896b9ed7f7c4616c5a372baa04e20. The ASCII encoding of nonproprietary in hexadecimal notation is 6e6f6e70726f7072696574617279.