Ghous Amjad

Paper 2023/1199 RSA Blind Signatures with Public Metadata , Google (United States) , Google (United States) , Google (United States) Abstract Anonymous tokens are digital signature schemes that enable an issuer to provider users with signatures without learning the input message or the resulting signature received by the user. These primitives allow applications to propagate trust while simultaneously protecting the identity of the user.

Paper 2021/765 Dynamic Volume-Hiding Encrypted Multi-Maps with Applications to Searchable Encryption Abstract We study encrypted storage schemes where a client outsources data to an untrusted third-party server (such as a cloud storage provider) while maintaining the ability to privately query and dynamically update the data. We focus on encrypted multi-maps (EMMs), a structured encryption (STE) scheme that stores pairs of label and value tuples.

Paper 2023/533 Injection-Secure Structured and Searchable Symmetric Encryption , Google (United States) , Brown University, MongoDB , MongoDB Abstract Recent work on dynamic structured and searchable symmetric encryption has focused on achieving the notion of forward-privacy. This is mainly motivated by the claim that forward-privacy protects against adaptive file injection attacks (Zhang, Katz, Papamanthou, Usenix Security, 2016).