The term defense contractor is identified in base64 scheme by the sequence ZGVmZW5zZSBjb250cmFjdG9y, while the MD5 signature is equal to 9c53c9a8f340aa33ea2a6c041bfc734f. The ASCII encoding of defense contractor in hexadecimal notation is 646566656e736520636f6e74726163746f72.