The term impermissibility is identified in base64 scheme by the sequence aW1wZXJtaXNzaWJpbGl0eQ==, while the MD5 signature is equal to 099d6ab5541055e226285546b6c88f9c. The ASCII encoding of impermissibility in hexadecimal notation is 696d7065726d6973736962696c697479.