Banklaves: Concept for a Trustworthy Decentralized Payment Service for Bitcoin

Grundmann, Matthias; Leinweber, Marc; Hartenstein, Hannes

doi:10.1109/bloc.2019.8751394

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…Obscuro utilises Intel's SGX system secure enclave to separate application data from the rest of the system. Grundmann et al [8] have called this and similar services of TEEs BANKLAVES. Examples include Tesserect, Teechain and Obscuro.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The benefit of TEEs is that they are created with the assumption that in the event of a compromised OS, the enclave is secure and separated from the attacker, barring side channel attacks. The work in [8] outline as one of the key security objectives of TEEs that they aim to keep user balances and their performed transactions confidential from curious attackers. Bentov et al in [9] created Tesseract based on the assumption that an adversary (potentially the exchange operator) can gain complete physical access to the host in which the funds are stored and complete control of its network connections.…”

Section: Literature Reviewmentioning

confidence: 99%

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A Blockchain Framework in Post-Quantum Decentralization

Saha

Kumar

Devgun

et al. 2021

IEEE Trans. Serv. Comput.

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Little or no research has been directed to analysis and researching forensic analysis of the Bitcoin mixing or 'tumbling' service themselves. This work is intended to examine effective tooling and methodology for recovering forensic artifacts from two privacy focused mixing services namely Obscuro which uses the secure enclave on intel chips to provide enhanced confidentiality and Wasabi wallet which uses CoinJoin to mix and obfuscate crypto currencies. These wallets were set up on VMs and then several forensic tools used to examine these VM images for relevant forensic artifacts. These forensic tools were able to recover a broad range of forensic artifacts and found both network forensics and logging files to be a useful source of artifacts to deanonymize these mixing services.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

A Blockchain Framework in Post-Quantum Decentralization

Saha

Kumar

Devgun

et al. 2021

IEEE Trans. Serv. Comput.

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“…They have also been used to implement a trusted exchange [5], second layer architectures (e.g. Teechain [14] and Banklaves [10]), and an extension to Bitcoin to run arbitrary smart contracts [7]. In this work, we present TEE Guard, which is, to the best of our knowledge, a new approach to use TEEs in the world of cryptocurrencies by leveraging their features to implement a watchtower service for payment channel networks.…”

Section: Blockchain and Teesmentioning

confidence: 99%

TEE-Based Distributed Watchtowers for Fraud Protection in the Lightning Network

Leinweber

Grundmann

Schönborn

et al. 2019

Lecture Notes in Computer Science

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The Lightning Network is a payment channel network built on top of the cryptocurrency Bitcoin. It allows Bitcoin to scale by performing transactions off-chain to reduce load on the blockchain. Malicious payment channel participants can try to commit fraud by closing channels with outdated balances. The Lightning Network allows resolving this dispute on the blockchain. However, this mechanism forces the channels' participants to watch the blockchain in regular intervals. It has been proposed to offload this monitoring duty to a third party, called a watchtower. However, existing approaches for watchtowers do not scale as they have storage requirements linear in the number of updates in a channel. In this work, we propose TEE Guard, a new architecture for watchtowers that leverages the features of Trusted Execution Environments to build watchtowers that require only constant memory and are thus able to scale. We show that TEE Guard is deployable because it can run with the existing Bitcoin and Lightning Network protocols. We also show that it is economically viable for a third party to provide watchtower services. As a watchtower needs to be trusted to be watching the blockchain, we also introduce a mechanism that allows customers to verify that a watchtower has been running continuously.

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