The term demand for explanation is identified in base64 scheme by the sequence ZGVtYW5kIGZvciBleHBsYW5hdGlvbg==, while the MD5 signature is equal to 178287e00732f4399ad2e2ed37870055. The ASCII encoding of demand for explanation in hexadecimal notation is 64656d616e6420666f72206578706c616e6174696f6e.