The term national insurance is identified in base64 scheme by the sequence bmF0aW9uYWwgaW5zdXJhbmNl, while the MD5 signature is equal to 541cd7c0585ad2f0901c3c67ecf66ec1. The ASCII encoding of national insurance in hexadecimal notation is 6e6174696f6e616c20696e737572616e6365.