> For the complete documentation index, see [llms.txt](https://callisto-network.gitbook.io/callisto-network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions.md).

# Various Contributions

- [Ethereum Classic](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/ethereum-classic.md)
- [ECIP-1092 51attack solution: PirlGuard & Callisto proposal](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/ethereum-classic/ecip-1092-51attack-solution-pirlguard-and-callisto-proposal.md)
- [Ethereum](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/ethereum.md)
- [Statement regarding Geth v1.10.8 split](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/ethereum/statement-regarding-geth-v1.10.8-split.md)
- [EOS](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/eos.md)
- [Page 1Chintai (EOS resource exchange) low severity issue.](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/eos/page-1chintai-eos-resource-exchange-low-severity-issue..md)
- [EOS congestion 9/13/2019 and EOSPlay hack](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/eos/eos-congestion-9-13-2019-and-eosplay-hack.md)
- [Ultimate solution to 51% attacks: amend the Nakamoto consensus](https://callisto-network.gitbook.io/callisto-network/security-department/various-contributions/ultimate-solution-to-51-attacks-amend-the-nakamoto-consensus.md)