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- Ouroboros is a family of proof-of-stake consensus protocols used in the Cardano blockchain. It can run both permissionless and permissioned blockchains. Ouroboros was published as "the first provable secure PoS consensus protocol". It was postulated by an academic team led by Aggelos Kiayias at the Annual International Cryptology Conference in 2017. Later that year, Ouroboros (Classic) was used by IOHK as the basis of the Cardano blockchain platform and various upgrades. Ouroboros versions include:
* Ouroboros BFT was an interim version used in 2020 to enable the switch between the Classic and Praos versions of Cardano using a that preserved the blockchain history;
* Ouroboros Praos (2017) provided security against fully-adaptive corruption in the semi-synchronous model. In 2020, this version was used to introduce decentralized block production on Cardano by stake pools;
* Ouroboros Genesis (2018): security with a dynamic participation model;
* Ouroboros Chronos (2019): protocol is independent of global time;
* Ouroboros Crypsinous (2019) gives higher levels of privacy. Cardano's founder Charles Hoskinson has described the Ouroboros consensus mechanism as energy efficient. Nguyen et al. compared Ouroboros to other PoS protocols. (en)
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- Ouroboros is a family of proof-of-stake consensus protocols used in the Cardano blockchain. It can run both permissionless and permissioned blockchains. Ouroboros was published as "the first provable secure PoS consensus protocol". It was postulated by an academic team led by Aggelos Kiayias at the Annual International Cryptology Conference in 2017. Later that year, Ouroboros (Classic) was used by IOHK as the basis of the Cardano blockchain platform and various upgrades. Ouroboros versions include: (en)
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- Ouroboros (protocol) (en)
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