Cryptology ePrint Archive: Report 2021/161

Generic Adaptor Signature

Xianrui Qin and Handong Cui and Tsz Hon Yuen

Abstract: Adaptor signature is becoming an increasingly important tool in solving the scalability and interoperability issues of blockchain applications. It has many useful properties, such as reducing the on-chain communication cost, increasing the fungibility of transactions, and circumventing the limitation of the blockchain's scripting language. In this paper, we propose the first generic construction of adaptor signatures from {\sf Type-T} canonical identification, which includes discrete-logarithm-based, RSA-based, and lattice-based constructions. Our generic construction can be used as a general framework to combine with different privacy-preserving cryptosystems. We propose blind adaptor signature and linkable ring adaptor signature, which are useful in different blockchain applications.

Category / Keywords: cryptographic protocols / adaptor signature, ring signature, blind signature

Date: received 13 Feb 2021, last revised 18 May 2021

Contact author: xrqin at cs hku hk,hdcui@cs hku hk,thyuen@cs hku hk

Available format(s): PDF | BibTeX Citation

Version: 20210518:075443 (All versions of this report)

Short URL: ia.cr/2021/161