Profile Encryption

    1. Store the username un, first name fn, last name ln, user roles rs, user department dt, time when user profile was encrypted in UtcTicks ut (number of 100-nanosecond intervals that have elapsed since 12:00:00 midnight on January 1, 0001), and expiry time te in minutes in a JSON string:

{

    "un":"John.Citizen",

    "fn":"John",

    "ln":"Citizen",

    "rs":["Administrator","AlertAdmin","ClientAdmin"],

    "dt":"HumanResources,IT",

    "ut":637277353891062353,

    "te": 30

}

    2. Encrypt the JSON string using the AES cryptoalgorithm with a 128-bit key (https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.aescryptoserviceprovider).

    3. Use Base64 encoding to encode the array of encrypted bytes.