Extraction Security of Sequential Aggregate Signatures

Abstract

Aggregate signature schemes enable anyone to compress many signatures into one. Besides the unforgeability of aggregate signature, another property called aggregate extraction sometimes is useful. In sequential aggregate signature schemes, the aggregate signature is computed incrementally by the signers. We introduce extraction security in the sequential context which can be seen as an analogy of aggregate extraction introduced by Boneh et al. in CRYPTO 2003. In addition to the practical meaning, it also has benefits in the construction of hierarchical identity‐based signatures as we will point out. We study several well known aggregate signature schemes and prove some of them satisfy extraction security.

A study of the process-based construction path for the speedy adjudication process for personality rights injunctions

“…The subject of an application for an injunction of personality includes, in addition to natural persons, legal or unincorporated organisations with personality rights [5]. When a natural person applies for an injunction of personality rights, as the rights protected by personality rights are the rights to life, health, body and other rights closely related to personal freedom, the provisions of Article 23 of the Anti-Domestic Violence Law can be used as a reference, where the person concerned is an incapable person or a person with restricted civil capacity, or is unable to apply for an injunction of personality rights on his or her own due to intimidation or threat of violence, the application can be made by his or her guardian, close relative, the unit where the person concerned is located, the village committee or neighbourhood committee where the person concerned is located, and other statutory authorities or organisations that have the obligation to protect personality rights on his or her behalf.…”