> For the complete documentation index, see [llms.txt](https://docs.viide.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viide.io/technology/par-system.md).

# PAR System

Privacy-preserving Advertisement Recommendation

Viide adopts Secure Multi-party Computation to protect the security and privacy of users.

Blockchain-based Zero-Knowledge Proofs.

Flexible and efficient Federated Learning.

![](/files/RLQL3LGbeK4fGOVWhwDH)