protected static void newSessionGuid()
{
lock (syncObject)
{
var bb = new BytesBuilder();
byte[] target = null;
BytesBuilder.ULongToBytes((ulong)DateTime.Now.Ticks, ref target);
bb.add(target);
bb.add(staticBytes);
sessionGuid = SHA3.generateRandomPwd(bb.getBytes(), 20);
}
}