# Guardian provers

**Published by:** [briq)master](https://paragraph.com/@briq-master/)
**Published on:** 2024-01-22
**URL:** https://paragraph.com/@briq-master/guardian-provers

## Content

Prover availability A potential vulnerability of the contestation design is the lack of active higher-tier provers, especially since contestations are infrequent. To maintain a pool of available high-tier provers, Taiko introduces a mechanism that randomly assigns a minimum required tier for each new block. The likelihood of a block being assigned a higher tier is inversely proportional to the tier level; for instance, only 5% of blocks might require SGX+ZKP, while 20% demand ZKP, leaving the majority to require just SGX. This ensures that ZK provers always have work to keep them engaged and profitable.

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