PAP stands for Privacy and Protection. Its a decentralized electronic voucher protocol offering "unlimited, anonymous electronic vouchers" without requiring trust in any third party. It utilizes "zero-knowledge succinct non-interactive arguments of knowledge" (zk-SNARKs) and homomorphic data structures to ensure the anonymity of voucher holders, the privacy of information transmission, and the confidentiality of data structures. Even with big data tracking, transactions remain untraceable.

PAP platform tokens are issued based on the Ethereum ERC-20 standard, with the full name Privacy And Protection Cash System Token. The Chinese name is "密安币".

PAP has the following functions:
1. Community governance function
2. Community improvement function
3. Profit sharing function