The term difference threshold is identified in base64 scheme by the sequence ZGlmZmVyZW5jZSB0aHJlc2hvbGQ=, while the MD5 signature is equal to a2807294258656e41c9075d89af88bea. The ASCII encoding of difference threshold in hexadecimal notation is 646966666572656e6365207468726573686f6c64.