The term visually impaired person is identified in base64 scheme by the sequence dmlzdWFsbHkgaW1wYWlyZWQgcGVyc29u, while the MD5 signature is equal to 9ac055ee35b47fa4fab28611b85c7be9. The ASCII encoding of visually impaired person in hexadecimal notation is 76697375616c6c7920696d70616972656420706572736f6e.