The term self-restraining is identified in base64 scheme by the sequence c2VsZi1yZXN0cmFpbmluZw==, while the MD5 signature is equal to 5a62ccca56b337e577d6e2f39d0af2ed. The ASCII encoding of self-restraining in hexadecimal notation is 73656c662d726573747261696e696e67.