Advances in Functional Encryption

A special issue of Information (ISSN 2078-2489). This special issue belongs to the section "Information Applications".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 2801

Special Issue Editor


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Guest Editor
University of Salerno, 84084 Fisciano SA, Italy
Interests: cryptography ; computer security

Special Issue Information

Dear Colleagues,

In recent years, motivated by the growth of cloud computing researchers started to look at technologies that enable fine-grained control over encrypted data. In this direction, one of the most popular solutions is Functional Encryption (FE). It represents a generalization of (public-key) encryption that allows to compute functions or search over encrypted data. The development of functional encryption technologies will hopefully help in the future to reduce the gap between privacy and functionality in many digital services and products used daily by people.

The purpose of this Special Issue is to present the latest developments in functional encryption and related primitives and technologies. Both theoretical and applied works are welcome. Researchers in the field are invited to contribute with novel and unpublished works.

Topics of interest include but are not limited to:

  • Functional encryption;
  • Attribute-based encryption;
  • Identity-based encryption;
  • Software obfuscation;
  • Searchable encryption;
  • Encryption and digital signatures with special properties;
  • Secure cloud computing

Dr. Vincenzo Iovino
Guest Editor

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Published Papers (1 paper)

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Research

18 pages, 1590 KiB  
Article
Public Key Encryption with Equality Test in a Cloud Environment
by Ping Zhang, Jinbo Li and Zhumu Fu
Information 2022, 13(6), 265; https://doi.org/10.3390/info13060265 - 24 May 2022
Cited by 1 | Viewed by 2085
Abstract
With the rapid development and wide application of cloud computing and 5G communication, the number of mobile users is increasing rapidly, meaning that cloud storage services are receiving more and more attention. The equality test technology of retrievable encrypted data has become a [...] Read more.
With the rapid development and wide application of cloud computing and 5G communication, the number of mobile users is increasing rapidly, meaning that cloud storage services are receiving more and more attention. The equality test technology of retrievable encrypted data has become a hot research topic among scholars in recent years. In view of the problem of offline keyword-guessing attacks (KGAs) caused by collusion between internal servers and users, a public key encryption with equality test scheme (RKGA-CET) with higher security against KGAs is proposed. Based on the assumed difficulty of the discrete logarithm problem (DLP) and the properties of bilinear mapping, a specific encryption algorithm that encrypts the keyword twice is designed. In the first encryption stage, we convert the keyword according to the property of isomorphism of a finite field. In the second encryption stage, we encrypt the converted keyword vector and embed the user’s private key, and then perform the equality test. The algorithm ensures that the adversary cannot generate legal ciphertexts and implement KGAs when the secondary server is offline. At the same time, the algorithm also supports two authorization modes, in which case users can flexibly choose the corresponding authorization mode according to their own needs. Performance analysis shows that this scheme has overall superiority compared with other similar ones. Full article
(This article belongs to the Special Issue Advances in Functional Encryption)
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