Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks

Bin Yu; Shabnam Kasra Kermanshahi; Amin Sakzad; Surya Nepal

doi:10.1007/978-3-030-31919-9_18

Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks

Bin Yu, Shabnam Kasra Kermanshahi, Amin Sakzad, Surya Nepal

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

23 Citations (Scopus)

Abstract

Payment channel networks (PCNs) have been proposed to address the low transaction throughput of the permissionless blockchain protocols. Though the PCNs allow users to have the unlimited number of transactions in the channel without interacting with blockchain, it leaks the entire payment paths to the public. To address the payment path leakage issue, we propose a Chameleon-hash based payment protocol, called Chameleon Hash Time-Lock Contract (CHTLC). Using Chameleon-hash function in a multi-layer fashion guarantees that no user can recover the payment path if at least one intermediate payment node is honest. For the same payment path, compared with Multi-hop Hash Time-Lock Contract (MHTLC) protocol of Malavolta et al. [1], CHTLC is 5 times faster in the payment data initialisation, and the communication bandwidth is reduced significantly from 17, 000 KB to just 7.7 KB.

Original language	English
Title of host publication	Provable Security
Subtitle of host publication	13th International Conference, ProvSec 2019 Cairns, QLD, Australia, October 1–4, 2019 Proceedings
Editors	Ron Steinfeld, Tsz Hon Yuen
Place of Publication	Cham Switzerland
Publisher	Springer
Pages	303-318
Number of pages	16
ISBN (Electronic)	9783030319199
ISBN (Print)	9783030319182
DOIs	https://doi.org/10.1007/978-3-030-31919-9_18
Publication status	Published - 2019
Event	International Conference on Provable Security 2019 - Cairns, Australia Duration: 1 Oct 2019 → 4 Oct 2019 Conference number: 13th https://www.monash.edu/provsec2019 https://link.springer.com/book/10.1007/978-3-030-31919-9 (Proceedings)

Publication series

Name	Lecture Notes in Computer Science
Publisher	Springer
Volume	11821
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

Conference

Conference	International Conference on Provable Security 2019
Abbreviated title	ProvSec 2019
Country/Territory	Australia
City	Cairns
Period	1/10/19 → 4/10/19
Internet address	https://www.monash.edu/provsec2019 https://link.springer.com/book/10.1007/978-3-030-31919-9 (Proceedings)

Keywords

Blockchain
Payment channel networks
Payment privacy

Access to Document

10.1007/978-3-030-31919-9_18

Cite this

Yu, B., Kermanshahi, S. K., Sakzad, A., & Nepal, S. (2019). Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks. In R. Steinfeld, & T. H. Yuen (Eds.), Provable Security: 13th International Conference, ProvSec 2019 Cairns, QLD, Australia, October 1–4, 2019 Proceedings (pp. 303-318). (Lecture Notes in Computer Science; Vol. 11821). Springer. https://doi.org/10.1007/978-3-030-31919-9_18

Yu, Bin ; Kermanshahi, Shabnam Kasra ; Sakzad, Amin et al. / Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks. Provable Security: 13th International Conference, ProvSec 2019 Cairns, QLD, Australia, October 1–4, 2019 Proceedings. editor / Ron Steinfeld ; Tsz Hon Yuen. Cham Switzerland : Springer, 2019. pp. 303-318 (Lecture Notes in Computer Science).

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title = "Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks",

abstract = "Payment channel networks (PCNs) have been proposed to address the low transaction throughput of the permissionless blockchain protocols. Though the PCNs allow users to have the unlimited number of transactions in the channel without interacting with blockchain, it leaks the entire payment paths to the public. To address the payment path leakage issue, we propose a Chameleon-hash based payment protocol, called Chameleon Hash Time-Lock Contract (CHTLC). Using Chameleon-hash function in a multi-layer fashion guarantees that no user can recover the payment path if at least one intermediate payment node is honest. For the same payment path, compared with Multi-hop Hash Time-Lock Contract (MHTLC) protocol of Malavolta et al. [1], CHTLC is 5 times faster in the payment data initialisation, and the communication bandwidth is reduced significantly from 17, 000 KB to just 7.7 KB.",

keywords = "Blockchain, Payment channel networks, Payment privacy",

author = "Bin Yu and Kermanshahi, {Shabnam Kasra} and Amin Sakzad and Surya Nepal",

year = "2019",

doi = "10.1007/978-3-030-31919-9_18",

language = "English",

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booktitle = "Provable Security",

note = "International Conference on Provable Security 2019, ProvSec 2019 ; Conference date: 01-10-2019 Through 04-10-2019",

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Yu, B, Kermanshahi, SK, Sakzad, A & Nepal, S 2019, Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks. in R Steinfeld & TH Yuen (eds), Provable Security: 13th International Conference, ProvSec 2019 Cairns, QLD, Australia, October 1–4, 2019 Proceedings. Lecture Notes in Computer Science, vol. 11821, Springer, Cham Switzerland, pp. 303-318, International Conference on Provable Security 2019, Cairns, Queensland, Australia, 1/10/19. https://doi.org/10.1007/978-3-030-31919-9_18

Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks. / Yu, Bin; Kermanshahi, Shabnam Kasra; Sakzad, Amin et al.
Provable Security: 13th International Conference, ProvSec 2019 Cairns, QLD, Australia, October 1–4, 2019 Proceedings. ed. / Ron Steinfeld; Tsz Hon Yuen. Cham Switzerland: Springer, 2019. p. 303-318 (Lecture Notes in Computer Science; Vol. 11821).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

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N2 - Payment channel networks (PCNs) have been proposed to address the low transaction throughput of the permissionless blockchain protocols. Though the PCNs allow users to have the unlimited number of transactions in the channel without interacting with blockchain, it leaks the entire payment paths to the public. To address the payment path leakage issue, we propose a Chameleon-hash based payment protocol, called Chameleon Hash Time-Lock Contract (CHTLC). Using Chameleon-hash function in a multi-layer fashion guarantees that no user can recover the payment path if at least one intermediate payment node is honest. For the same payment path, compared with Multi-hop Hash Time-Lock Contract (MHTLC) protocol of Malavolta et al. [1], CHTLC is 5 times faster in the payment data initialisation, and the communication bandwidth is reduced significantly from 17, 000 KB to just 7.7 KB.

AB - Payment channel networks (PCNs) have been proposed to address the low transaction throughput of the permissionless blockchain protocols. Though the PCNs allow users to have the unlimited number of transactions in the channel without interacting with blockchain, it leaks the entire payment paths to the public. To address the payment path leakage issue, we propose a Chameleon-hash based payment protocol, called Chameleon Hash Time-Lock Contract (CHTLC). Using Chameleon-hash function in a multi-layer fashion guarantees that no user can recover the payment path if at least one intermediate payment node is honest. For the same payment path, compared with Multi-hop Hash Time-Lock Contract (MHTLC) protocol of Malavolta et al. [1], CHTLC is 5 times faster in the payment data initialisation, and the communication bandwidth is reduced significantly from 17, 000 KB to just 7.7 KB.

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Yu B, Kermanshahi SK, Sakzad A, Nepal S. Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks. In Steinfeld R, Yuen TH, editors, Provable Security: 13th International Conference, ProvSec 2019 Cairns, QLD, Australia, October 1–4, 2019 Proceedings. Cham Switzerland: Springer. 2019. p. 303-318. (Lecture Notes in Computer Science). doi: 10.1007/978-3-030-31919-9_18

Chameleon Hash Time-Lock Contract for privacy preserving payment channel networks

Abstract

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Keywords

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