I am more interested and choose zcash. The primary privacy feature that Zcash uses is zero-knowledge Succinct Non-Interactive Argument of Knowledge proofs (zk-SNARKs).
That name may be a mouthful to pronounce, but the basic functionality that this privacy method offers is simple to articulate. zk-SNARKS encrypt all transactional data that is stored on the network. This method verifies that the data being exchanged is accurate, but it does so without revealing all of the transaction details.