Double-spending fast payments in bitcoin

Karame, Ghassan; Androulaki, Elli; Čapkun, Srđjan

doi:10.1145/2382196.2382292

Cited by 458 publications

(214 citation statements)

References 10 publications

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“…In [7], Babaioff et al address the lack of incentives for Bitcoin users to include recently announced transactions in a block, while in [4], Syed et al propose a user-friendly technique for managing Bitcoin wallets. In [14], Karame et al thoroughly investigate double-spending attacks in Bitcoin and show that double-spending fast payments in Bitcoin can be performed in spite of the measures recommended by Bitcoin developers. Clark et al [11] propose the use of the Bitcoin PoW to construct verifiable commitment schemes.…”

Section: Related Workmentioning

confidence: 99%

“…While malformed transactions and double-spending attempts [14] can be indeed witnessed in the genuine Bitcoin system, we believe that malicious behavior in Bitcoin is orthogonal to our privacy investigationwhich explains the reason why we did not model such a misbehavior in our simulator. Moreover, our simulator relies on a variant greedy algorithm that closely approximates the genuine algorithm used in Bitcoin.…”

Section: B Bitcoin Block Explorermentioning

confidence: 99%

“…Moreover, our simulator relies on a variant greedy algorithm that closely approximates the genuine algorithm used in Bitcoin. Note that while the distribution of generated blocks in our simulator matches that in Bitcoin [14] 8 , we increased the average time between the generation of successive blocks in the simulator to better cope with simulated network dynamics 9 .…”

Section: B Bitcoin Block Explorermentioning

confidence: 99%

See 2 more Smart Citations

Evaluating User Privacy in Bitcoin

Androulaki

Karame²,

Roeschlin

et al. 2013

Lecture Notes in Computer Science

Self Cite

544

383

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Abstract. Bitcoin is quickly emerging as a popular digital payment system. However, in spite of its reliance on pseudonyms, Bitcoin raises a number of privacy concerns due to the fact that all of the transactions that take place are publicly announced in the system. In this paper, we investigate the privacy provisions in Bitcoin when it is used as a primary currency to support the daily transactions of individuals in a university setting. More specifically, we evaluate the privacy that is provided by Bitcoin (i) by analyzing the genuine Bitcoin system and (ii) through a simulator that faithfully mimics the use of Bitcoin within a university. In this setting, our results show that the profiles of almost 40% of the users can be, to a large extent, recovered even when users adopt privacy measures recommended by Bitcoin. To the best of our knowledge, this is the first work that comprehensively analyzes, and evaluates the privacy implications of Bitcoin.

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Section: Related Workmentioning

confidence: 99%

Section: B Bitcoin Block Explorermentioning

confidence: 99%

Section: B Bitcoin Block Explorermentioning

confidence: 99%

See 1 more Smart Citation

Evaluating User Privacy in Bitcoin

Androulaki

Karame²,

Roeschlin

et al. 2013

Lecture Notes in Computer Science

Self Cite

544

383

View full text Add to dashboard Cite

show abstract

“…It was shown that the attack is successful whenever the number of confirmations of a dishonest transaction is greater than the number of confirmations of the honest one. In [19] the authors exploit non-confirmed transactions to implement double spending attacks on fast payments, and [26] shows how such attacks coupled with high computational resources can have a higher success rate. Apart from the attacks that target transactions, privacy has also been targeted.…”

Section: Introductionmentioning

confidence: 99%

Low-Level Attacks in Bitcoin Wallets

Gkaniatsou

Arapinis

Kiayias

2017

Lecture Notes in Computer Science

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Abstract. As with every financially oriented protocol, there has been a great interest in studying, verifying, attacking, identifying problems, and proposing solutions for Bitcoin. Within that scope, it is highly recommended that the keys of user accounts are stored offline. To that end, companies provide solutions that range from paper wallets to tamper-resistant smart-cards, offering different level of security. While incorporating expensive hardware for the wallet purposes is though to bring guarantees, it is often that the low-level implementations introduce exploitable back-doors. This paper aims to bring to attention how the overlooked low-level protocols that implement the hardware wallets can be exploited to mount Bitcoin attacks. To demonstrate that, we analyse the general protocol behind LEDGER Wallets, the only EAL5+ certified against side channel analysis attacks hardware. In this work we conduct a throughout analysis on the Ledger Wallet communication protocol and show how to successfully attack it in practice. We address the lack of well-defined security properties that Bitcoin wallets should conform by articulating a minimal threat model against which any hardware wallet should defend. We further use that threat model to propose a lightweight fix that can be adopted by different technologies.

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“…Alike assaults tin can be forestalled when the assault board crowds the exchange in reserve mode till square affirmation. The twofold spending issue can be tended to through such a system (Figure 3.9.1) [38]. 5.…”

mentioning

confidence: 99%

Security in Cloud Computing Using Blockchain Technology

Y¹,

Kumar²

2018

Nciccnda

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Blockchain devours strained consideration by way of the forefront budgetary invention since of its safety that ensembles the informatization period. Exactly, it stretches safety finished the validation of associates that agreement computer-generated currency, encryption, then the age of jumble esteem. As designated through the worldwide budgetary manufacturing, the arcade for safety-based blockchain invention is relied upon to develop to around USD 20 billion by 2020. Also, blockchain dismiss be connected past the Internet of Things (IoT) condition, its applications are relied upon to grow. Distributed calculating has remained significantly received in completely IT situations aimed at its effectiveness then accessibility. Now this project, here examine affected idea of blockchain innovation then its scorching investigation patterns. We resolve think about in what way to adjust blockchain safety to distributed calculating and its protected arrangements in feature.Index Terms-About four key words or phrases in alphabetical order, separated by commas. Keywords are used to retrieve documents in an information system such as an online journal or a search engine. (Mention 4-5 keywords)

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Double-spending fast payments in bitcoin

Cited by 458 publications

References 10 publications

Evaluating User Privacy in Bitcoin

Evaluating User Privacy in Bitcoin

Low-Level Attacks in Bitcoin Wallets

Security in Cloud Computing Using Blockchain Technology

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