128bit
6.Many domestic products already exceed that recommendation and allow 128bit keys.
7.In cryptography, a product cipher developed by IBM that formed the basis of DES. It used 128-bit data blocks and a 128-bit key.
9.IPv6 uses 128-bit addresses, offering a theoretical maximum of 340 trillion, trillion, trillion hosts.
10.Next generation IP protocol namely IPv6 adopts 128-bit address that differs to IPv4, which adopts 32-bit address, and that means infinite address space.

