| Texto completo | |
| Autor(es): |
Marques, Marco Antonio
;
Cardoso, Lucas Cupertino
;
Correia, Pedro H. Barcha
;
Miers, Charles Christian
;
Simplicio Junior, Marcos Antonio
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF INFORMATION SECURITY AND APPLICATIONS; v. 97, p. 11-pg., 2026-03-26. |
| Resumo | |
The increasing adoption of extensible and decentralized token systems demands efficient and flexible signature schemes. Aggregate signatures enable the combination of multiple signatures on various messages into a single aggregate. Existing techniques often lack support for features such as delegation and extension, or introduce significant complexity without clear advantages over non-aggregated schemes. This paper presents SchoCo, a Schnorr-based half-aggregate scheme designed for extensible tokens. Its security is proven in the random oracle model through a reduction to the existential unforgeability under adaptive chosen-message attacks of the Schnorr signature scheme. The proposed scheme is inspired by the identity-based signature technique developed by Galindo and Garcia. It achieves signature sizes comparable to existing schemes while cutting verification costs by up to 50%. Furthermore, we show that SchoCo is well-suited for integrating token-based authorization frameworks, using the Biscuit token as a concrete instantiation, with practical gains in both token size and verification efficiency. (AU) | |
| Processo FAPESP: | 20/09850-0 - Centro de Pesquisa Aplicada em Inteligência Artificial: impulsionando a transformação das indústrias rumo ao padrão 5.0 |
| Beneficiário: | Jefferson de Oliveira Gomes |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa Aplicada |