The term digital plethysmograph is identified in base64 scheme by the sequence ZGlnaXRhbCBwbGV0aHlzbW9ncmFwaA==, while the MD5 signature is equal to a7f4259fc03fc3af77b8f02ce00a1633. The ASCII encoding of digital plethysmograph in hexadecimal notation is 6469676974616c20706c65746879736d6f6772617068.