> For the complete documentation index, see [llms.txt](https://docs.zk.link/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zk.link/architecture/settlement-layer/security-assumptions-of-zklink-nexus-and-origin.md).

# Security Assumptions of zkLink Nexus and Origin

|                      | Solutions                                                   | Security Assumption                                                                             |
| -------------------- | ----------------------------------------------------------- | ----------------------------------------------------------------------------------------------- |
| Classic zkRollup     | zkSync Era, StarkNet, Scroll, Polygon zkEVM, Linea,Taiko... | Ethereum Equivalent                                                                             |
| Multi-chain zkRollup | zkLink Nexus                                                | Ethereum Equivalent                                                                             |
| Multi-chain zkRollup | zkLink Origin                                               | <p>The Sequencer and the Light Oracle Network</p><p>cannot collude for malicious activities</p> |

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