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Towards fairness and decentralisation in modern cryptocurrencies (2019)
Thesis
Carr, C. Towards fairness and decentralisation in modern cryptocurrencies. (Thesis). NTNU and QUT. Retrieved from https://uwe-repository....ribe.com/output/5541122

The thesis examines and improves upon the properties of both fairness and decentralisation in modern cryptocurrencies, re-examining public key infrastructure, client puzzles and useful proofs of work in the blockchain context. The thesis also dev... Read More about Towards fairness and decentralisation in modern cryptocurrencies.

Valuable Puzzles for Proofs-of-Work (2018)
Conference Proceeding
Boyd, C., & Carr, C. (2018). Valuable Puzzles for Proofs-of-Work. In Data Privacy Management, Cryptocurrencies and Blockchain Technology, (130-139). https://doi.org/10.1007/978-3-030-00305-0_10

Proof-of-work (PoW) is used as the consensus mechanism in most cryptocurrencies. PoW-based puzzles play an important part in the operation and security of a cryptocurrency, but come at a considerable energy cost. One approach to the problem of energy... Read More about Valuable Puzzles for Proofs-of-Work.

Graphchain: A blockchain-free scalable decentralised ledger (2018)
Conference Proceeding
Boyen, X., Carr, C., & Haines, T. (2018). Graphchain: A blockchain-free scalable decentralised ledger. In S. V. Lokam, S. Ruj, & K. Sakurai (Eds.), https://doi.org/10.1145/3205230.3205235

© 2018 Copyright held by the owner/author(s). Blockchain-based replicated ledgers, pioneered in Bitcoin, are effective against double spending, but inherently attract centralised mining pools and incompressible transaction delays. We propose a framew... Read More about Graphchain: A blockchain-free scalable decentralised ledger.

CARIBE: Cascaded IBE for maximum flexibility and user-side control (2017)
Conference Proceeding
Hale, B., Carr, C., & Gligoroski, D. (2017). CARIBE: Cascaded IBE for maximum flexibility and user-side control. https://doi.org/10.1007/978-3-319-61273-7_19

© Springer International Publishing AG 2017. Mass surveillance and a lack of end-user encryption, coupled with a growing demand for key escrow under legal oversight and certificate authority security concerns, raise the question of the appropriatenes... Read More about CARIBE: Cascaded IBE for maximum flexibility and user-side control.

Key recovery: Inert and public (2017)
Conference Proceeding
Boyd, C., Boyen, X., Carr, C., & Haines, T. (2017). Key recovery: Inert and public. In Paradigms in Cryptology - Mycrypt 2016. Malicious and Exploratory Cryptology - Second International Conference, Mycrypt 2016, Kuala Lumpur, Malaysia, December 1-2, 2016, Revised Selected Papers, (111-126). https://doi.org/10.1007/978-3-319-61273-7_6

We propose a public key infrastructure framework, inspired by modern distributed cryptocurrencies, that allows for tunable key escrow, where the availability of key escrow is only provided under strict conditions and enforced through cryptographic me... Read More about Key recovery: Inert and public.

Bitcoin unchained (2017)
Journal Article
Carr, C., Boyd, C., Boyen, X., & Haines, T. (2017). Bitcoin unchained. ERCIM News, 2017(110),

Bitcoin’s distributed ledger is an innovative way of solving the double spending problem in a decentralised system. However, it causes incompressible transaction delays and incentivises consolidation of mining power. We ask, is it possible to elimina... Read More about Bitcoin unchained.

Fair client puzzles from the Bitcoin blockchain (2016)
Conference Proceeding
Boyd, C., & Carr, C. (2016). Fair client puzzles from the Bitcoin blockchain. In J. K. Liu, & R. Steinfeld (Eds.), https://doi.org/10.1007/978-3-319-40253-6_10

Client puzzles have been proposed as a mechanism for proving legitimate intentions by providing “proofs of work”, which can be applied to discourage malicious usage of resources. A typical problem of puzzle constructions is the difference in expected... Read More about Fair client puzzles from the Bitcoin blockchain.

A guide to fully homomorphic encryption (2015)
Journal Article
Armknecht, F., Boyd, C., Carr, C., Gjøsteen, K., Jäschke, A., Reuter, C. A., & Strand, M. (2015). A guide to fully homomorphic encryption. IACR Cryptology ePrint Archive, 2015, 1192

Fully homomorphic encryption (FHE) has been dubbed the holy grail of cryptography, an elusive goal which could solve the IT world’s problems of security and trust. Research in the area exploded after 2009 when Craig Gentry showed that FHE can be real... Read More about A guide to fully homomorphic encryption.


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