Affordable security or big guy vs small guy: Does the depth of your pockets impact your protocols?

D. Friolo; F. Massacci; C.N. Ngo; D. Venturi

doi:10.1007/978-3-030-57043-9_13

Affordable security or big guy vs small guy: Does the depth of your pockets impact your protocols?

D. Friolo
, F. Massacci
, C.N. Ngo
, D. Venturi

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

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Abstract

When we design a security protocol we assume that the humans (or organizations) playing Alice and Bob do not make a difference. In particular, their financial capacity seems to be irrelevant.

In the latest trend to guarantee that secure multi-party computation protocols are fair and not vulnerable to malicious aborts, a slate of protocols has been proposed based on penalty mechanisms. We look at two well-known penalty mechanisms, and show that the so-called see-saw mechanism (Kumaresan et al., CCS 15), is only fit for people with deep pockets, well beyond the stake in the multi-party computation itself.

Depending on the scheme, fairness is not affordable by everyone which has several policy implications on protocol design. To explicitly capture the above issues, we introduce a new property called financial fairness.

Original language	English
Title of host publication	Security Protocols XXVII
Subtitle of host publication	27th International Workshop, Cambridge, UK, April 10–12, 2019, Revised Selected Papers
Editors	Jonathan Anderson, Frank Stajano, Bruce Christianson, Vashek Matyáš
Publisher	Springer
Pages	135-147
Number of pages	13
ISBN (Electronic)	9783030570439
ISBN (Print)	9783030570422
DOIs	https://doi.org/10.1007/978-3-030-57043-9_13
Publication status	Published - 2020

Publication series

Name	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume	12287 LNCS
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

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SDG 16 Peace, Justice and Strong Institutions

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10.1007/978-3-030-57043-9_13

Affordable Security or Big Guy vs Small GuyFinal published version, 450 KBLicence: Article 25fa Dutch Copyright Act

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Friolo, D., Massacci, F., Ngo, C. N., & Venturi, D. (2020). Affordable security or big guy vs small guy: Does the depth of your pockets impact your protocols? In J. Anderson, F. Stajano, B. Christianson, & V. Matyáš (Eds.), Security Protocols XXVII: 27th International Workshop, Cambridge, UK, April 10–12, 2019, Revised Selected Papers (pp. 135-147). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 12287 LNCS). Springer. https://doi.org/10.1007/978-3-030-57043-9_13

Friolo, D. ; Massacci, F. ; Ngo, C.N. et al. / Affordable security or big guy vs small guy : Does the depth of your pockets impact your protocols?. Security Protocols XXVII: 27th International Workshop, Cambridge, UK, April 10–12, 2019, Revised Selected Papers. editor / Jonathan Anderson ; Frank Stajano ; Bruce Christianson ; Vashek Matyáš. Springer, 2020. pp. 135-147 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)).

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Friolo, D, Massacci, F, Ngo, CN & Venturi, D 2020, Affordable security or big guy vs small guy: Does the depth of your pockets impact your protocols? in J Anderson, F Stajano, B Christianson & V Matyáš (eds), Security Protocols XXVII: 27th International Workshop, Cambridge, UK, April 10–12, 2019, Revised Selected Papers. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 12287 LNCS, Springer, pp. 135-147. https://doi.org/10.1007/978-3-030-57043-9_13

Affordable security or big guy vs small guy: Does the depth of your pockets impact your protocols? / Friolo, D.; Massacci, F.; Ngo, C.N. et al.
Security Protocols XXVII: 27th International Workshop, Cambridge, UK, April 10–12, 2019, Revised Selected Papers. ed. / Jonathan Anderson; Frank Stajano; Bruce Christianson; Vashek Matyáš. Springer, 2020. p. 135-147 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 12287 LNCS).

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

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AB - When we design a security protocol we assume that the humans (or organizations) playing Alice and Bob do not make a difference. In particular, their financial capacity seems to be irrelevant. In the latest trend to guarantee that secure multi-party computation protocols are fair and not vulnerable to malicious aborts, a slate of protocols has been proposed based on penalty mechanisms. We look at two well-known penalty mechanisms, and show that the so-called see-saw mechanism (Kumaresan et al., CCS 15), is only fit for people with deep pockets, well beyond the stake in the multi-party computation itself. Depending on the scheme, fairness is not affordable by everyone which has several policy implications on protocol design. To explicitly capture the above issues, we introduce a new property called financial fairness.

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Friolo D, Massacci F, Ngo CN, Venturi D. Affordable security or big guy vs small guy: Does the depth of your pockets impact your protocols? In Anderson J, Stajano F, Christianson B, Matyáš V, editors, Security Protocols XXVII: 27th International Workshop, Cambridge, UK, April 10–12, 2019, Revised Selected Papers. Springer. 2020. p. 135-147. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)). Epub 2020 Aug 21. doi: 10.1007/978-3-030-57043-9_13

Affordable security or big guy vs small guy: Does the depth of your pockets impact your protocols?

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