[2407.16473] CrudiTEE: A Stick-and-Carrot Approach to Building Trustworthy Cryptocurrency Wallets with TEEs
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Computer Science > Cryptography and Security

arXiv:2407.16473 (cs)
[Submitted on 23 Jul 2024]

Title:CrudiTEE: A Stick-and-Carrot Approach to Building Trustworthy Cryptocurrency Wallets with TEEs

Authors:Lulu Zhou, Zeyu Liu, Fan Zhang, Michael K. Reiter
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Abstract:Cryptocurrency introduces usability challenges by requiring users to manage signing keys. Popular signing key management services (e.g., custodial wallets), however, either introduce a trusted party or burden users with managing signing key shares, posing the same usability challenges. TEEs (Trusted Execution Environments) are a promising technology to avoid both, but practical implementations of TEEs suffer from various side-channel attacks that have proven hard to eliminate.
This paper explores a new approach to side-channel mitigation through economic incentives for TEE-based cryptocurrency wallet solutions. By taking the cost and profit of side-channel attacks into consideration, we designed a Stick-and-Carrot-based cryptocurrency wallet, CrudiTEE, that leverages penalties (the stick) and rewards (the carrot) to disincentivize attackers from exfiltrating signing keys in the first place. We model the attacker's behavior using a Markov Decision Process (MDP) to evaluate the effectiveness of the bounty and enable the service provider to adjust the parameters of the bounty's reward function accordingly.
Subjects: Cryptography and Security (cs.CR)
Cite as: arXiv:2407.16473 [cs.CR]
  (or arXiv:2407.16473v1 [cs.CR] for this version)
  https://doi.org/10.48550/arXiv.2407.16473

Submission history

From: Lulu Zhou [view email]
[v1] Tue, 23 Jul 2024 13:44:19 UTC (724 KB)
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