The term public address system is identified in base64 scheme by the sequence cHVibGljIGFkZHJlc3Mgc3lzdGVt, while the MD5 signature is equal to 38a8440887d74b5c3e9615ddcc17a4e9. The ASCII encoding of public address system in hexadecimal notation is 7075626c696320616464726573732073797374656d.