The term hydrocyanic acid is identified in base64 scheme by the sequence aHlkcm9jeWFuaWMgYWNpZA==, while the MD5 signature is equal to b5f4788119defb9c35b3ce4fd3554098. The ASCII encoding of hydrocyanic acid in hexadecimal notation is 687964726f6379616e69632061636964.