The term ascii control character is identified in base64 scheme by the sequence YXNjaWkgY29udHJvbCBjaGFyYWN0ZXI=, while the MD5 signature is equal to 5c60e00d2f4e37dc702fbd5c228905f8. The ASCII encoding of ascii control character in hexadecimal notation is 617363696920636f6e74726f6c20636861726163746572.