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Paper 2018/774

Thring Signatures and their Applications to Spender-Ambiguous Digital Currencies

Brandon Goodell and Sarang Noether

Abstract

We present threshold ring multi-signatures (thring signatures) for collaborative computation of ring signatures. We discuss a game of existential forgery for thring signatures and the uses of thring signatures in digital currencies, including spender-ambiguous cross-chain atomic swaps for confidential amounts without a trusted set-up. We present an implementation of thring signatures inspired by the works of [13], [20], [14], [1], [18], and [15] we call linkable spontaneous threshold anonymous group (LSTAG) signatures, and we prove the implementation existentially unforgeable under the plain public key and random oracle models.

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Metadata
Available format(s)
PDF
Category
Cryptographic protocols
Publication info
Preprint. MINOR revision.
Keywords
ring signaturesconfidential transactionsspender ambiguitythreshold multi-signaturesthring signaturesatomic swapspublic-key cryptographyimplementationapplications
Contact author(s)
surae noether @ protonmail com
History
2018-08-28: revised
2018-08-27: received
See all versions
Short URL
https://ia.cr/2018/774
License
Creative Commons Attribution
CC BY
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