
            _sbox = new int[N];
            var key = new int[N];

            for (var a = 0; a < N; a++)
            {
                key[a] = _seedKey[a % _seedKey.Length];
                _sbox[a] = a;
            }

            var b = 0;
            for (var a = 0; a < N; a++)
            {