In hierarchical organizations, authenticating data from multiple users can be complex and resource-intensive. Hierarchical Identity-Based Signature with Designated Aggregator (HIBS-DA) provides an efficient solution by allowing users at different levels to generate signatures that can be combined into a single, compact signature. We first introduce the HIBS-DA framework and present the {\em{first}} lattice-based construction of HIBS-DA. Our scheme allows users at different hierarchical levels to generate individual signatures that can be aggregated into a single, compact signature, reducing communication and verification costs. The proposed construction is secure, correct, and resistant to forgery, making it suitable for large-scale environments such as universities, corporations, and government agencies.

翻译：在分层组织中，验证来自多个用户的数据可能复杂且资源消耗大。基于格的分层身份基指定聚合者签名（HIBS-DA）提供了一种高效解决方案，允许不同层级的用户生成可合并为单一紧凑签名的签名。我们首先引入HIBS-DA框架，并提出首个基于格的HIBS-DA构造方案。该方案允许不同层级用户生成可聚合为单一紧凑签名的独立签名，从而降低通信与验证开销。所提构造具备安全性、正确性与抗伪造性，适用于大学、企业及政府机构等大规模环境。