BlueBottle: Fast and Robust Blockchains through Subsystem Specialization
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912718849572864 |
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| author | Vos, Preston Vander Sonnino, Alberto Tsimos, Giorgos Jovanovic, Philipp Kokoris-Kogias, Lefteris |
| author_facet | Vos, Preston Vander Sonnino, Alberto Tsimos, Giorgos Jovanovic, Philipp Kokoris-Kogias, Lefteris |
| contents | Blockchain consensus faces a trilemma of security, latency, and decentralization. High-throughput systems often require a reduction in decentralization or robustness against strong adversaries, while highly decentralized and secure systems tend to have lower performance. We present BlueBottle, a two-layer consensus architecture. The core layer, BB-Core, is an n=5f+1 protocol that trades some fault tolerance for a much lower finality latency with a medium-sized core validator set. Our experiments show that BB-Core reduces latency by 20-25% in comparison to Mysticeti. The guard layer, BB-Guard, provides decentralized timestamping, proactive misbehavior detection in BB-Core, and a synchronous recovery path. When it observes equivocations or liveness failures in the core -- while tolerating up to f<3n/5 faulty nodes in the primary layer -- guard validators disseminate evidence, agree on misbehaving parties for exclusion or slashing, and either restart the core protocol (for liveness violations) or select a canonical fork (for safety violations). Together, these layers enable optimistic sub-second finality at high throughput while maintaining strong safety and liveness under a mild synchrony assumption. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_15361 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | BlueBottle: Fast and Robust Blockchains through Subsystem Specialization Vos, Preston Vander Sonnino, Alberto Tsimos, Giorgos Jovanovic, Philipp Kokoris-Kogias, Lefteris Distributed, Parallel, and Cluster Computing Cryptography and Security Blockchain consensus faces a trilemma of security, latency, and decentralization. High-throughput systems often require a reduction in decentralization or robustness against strong adversaries, while highly decentralized and secure systems tend to have lower performance. We present BlueBottle, a two-layer consensus architecture. The core layer, BB-Core, is an n=5f+1 protocol that trades some fault tolerance for a much lower finality latency with a medium-sized core validator set. Our experiments show that BB-Core reduces latency by 20-25% in comparison to Mysticeti. The guard layer, BB-Guard, provides decentralized timestamping, proactive misbehavior detection in BB-Core, and a synchronous recovery path. When it observes equivocations or liveness failures in the core -- while tolerating up to f<3n/5 faulty nodes in the primary layer -- guard validators disseminate evidence, agree on misbehaving parties for exclusion or slashing, and either restart the core protocol (for liveness violations) or select a canonical fork (for safety violations). Together, these layers enable optimistic sub-second finality at high throughput while maintaining strong safety and liveness under a mild synchrony assumption. |
| title | BlueBottle: Fast and Robust Blockchains through Subsystem Specialization |
| topic | Distributed, Parallel, and Cluster Computing Cryptography and Security |
| url | https://arxiv.org/abs/2511.15361 |