public unsafe void GenerateResumptionKey()
{
var timestamp = DateTime.UtcNow.ToBinary();
var code = stackalloc long[2];
_provider.FillWithRandom(code, 16);
code[0] = code[0] ^ timestamp;
var key = new byte[32];
var nounceBase = new byte[12];
_provider.FillWithRandom(key);
_provider.FillWithRandom(nounceBase);
var newKey = new ResumptionKey(code[0], code[1], key, nounceBase);
AddNewKey(DateTime.UtcNow.AddHours(4), DateTime.UtcNow.AddHours(-1), newKey);
}