Halo, a groundbreaking cryptographic discovery. This proving system, integrated into Zcash, dismisses the need for setup ceremonies. Halo's defining characteristic is its removal of reliance on "trusted setups", enhancing user confidence in Zcash while making it a more cost-effective and speedy base for further development. Halo 2, a subsequent iteration, further advances these capabilities, emphasizing its importance in the realm of zero-knowledge proving systems.