The term halftone engraving is identified in base64 scheme by the sequence aGFsZnRvbmUgZW5ncmF2aW5n, while the MD5 signature is equal to c44ad4df701f154568a834ccea69bf9a. The ASCII encoding of halftone engraving in hexadecimal notation is 68616c66746f6e6520656e67726176696e67.