The term optical illusion is identified in base64 scheme by the sequence b3B0aWNhbCBpbGx1c2lvbg==, while the MD5 signature is equal to 30643f12e9de254ce38dd35d12c8fbb4. The ASCII encoding of optical illusion in hexadecimal notation is 6f70746963616c20696c6c7573696f6e.