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"PKE-MET: Public-Key Encryption With Multi-Ciphertext Equality Test in " by Willy Susilo, Fuchun Guo et al.

Cloud computing enables users to remove the necessity of the need of local hardware architecture, which removes the burden of the users from high computation costs. Therefore, it has attracted much attention and research has been conducted heavily on it. To protect users' privacy, data is usually encrypted prior to being sent to the cloud server. As the resulting system is unusable, since the cloud can no longer search throughout the data, new cryptographic primitive such as public-key encryption with equality test (PKEET) has been introduced. In PKEET, users can test whether the underlying messages of two ciphertexts encrypted under different public keys are equal or not without the need to decrypt those ciphertexts. This is a very useful tool, especially for the cloud database, since PKEET mainly focuses on the equality test between two ciphertexts. However, in practice, the cloud server may need to verify the equivalence among more than two ciphertexts. This leads to disclosing ....

Cloud Computing , Ulti Ciphertext Equality Test , Public Key Encryption ,

"A Secure Cloud Data Sharing Protocol for Enterprise Supporting Hierarc" by Hongbo Li, Qiong Huang et al.

Cloud storage becomes the priority for storing and sharing data for enterprise users. Encrypting prior to uploading data to the cloud is the best way to protect business secrets, however, it hinders the convenient operations on plaintexts, such as searching over the cloud data. In addition, employees in an enterprise have multiple layer structures and a higher layer employee should have the privilege to monitor the lower layer employees' data to check if these users violate the regulation without letting the employees be aware of. Public key encryption with keyword search (PEKS) is a well-known cryptographic primitive suitable for secure cloud storage, which supports keyword search without decryption in public key encryption settings. Unfortunately, no existing PEKS scheme supports the monitoring function without authorization from the sender. To address this issue, we propose a variant of PEKS named Hierarchical Public Key Encryption with Keyword Search (HPEKS) and provide a semi ....

Hierarchical Public Key Encryption , Keyword Search , Cloud Storage , Keyword Guessing Attacks , Keyword Search , Public Key Encryption , Ecret Data Sharing ,

TL;DR - Hybrid Public Key Encryption

A new standardized way to do hybrid public key encryption. ....

Christopher Wood , Karthikeyan Bhargavan , Benjamin Lipp , Public Key Encryption , Key Encapsulation Mechanisms , Message Layer Security , Encrypted Client Hello , Transport Layer Security , Encoded Shared Secret ,

"Public Key Encryption with Fuzzy Matching" by Yuanhao Wang, Qiong Huang et al.

The rise of cloud computing is driving the development in various fields and becoming one of the hot topics in recent years. To solve the problem of comparing ciphertexts between different users in cloud storage, Public Key Encryption with Equality Test (PKEET) was proposed. In PKEET, a tester can determine whether two ciphertexts encrypted with different public keys contain the same message without decrypting the ciphertexts. However, PKEET only supports exact matching, which may not be practical when two messages have misspellings, formatting differences, or differences in the data itself. Therefore, to support fuzzy matching, in this paper we propose the concept of Public Key Encryption with Fuzzy Matching (PKEFM), which allows to determine whether the edit distance between two encrypted messages is less than a threshold value. PKEFM can be well applied to support fuzzy data comparison in encrypted e-mail systems or encrypted gene testing. We then modify the scheme to provide the de ....

Public Key Encryption , Equality Test , Fuzzy Matching , Cloud Computing , Edit Distance , Fuzzy Matching , Public Key Encryption ,

"Lightweight Public Key Encryption with Equality Test Supporting Partia" by Hao Lin, Zhen Zhao et al.

Public key encryption with equality test (PKEET) can check whether two ciphertexts are encrypted from the same message or not without decryption. This attribute enables PKEET to be increasingly utilized in cloud storage, where users store their encrypted data on the cloud. In traditional PKEET, the tester is authorized by the data receiver to perform equality test on its ciphertexts. However, the tester can only test one ciphertext or all ciphertexts of one receiver with one authorization. It means that the receiver cannot adaptively authorize the test right of any number of ciphertexts to the tester. A trivial solution is authorizing one ciphertext each time and repeating multiple times. The corresponding size of trapdoor in this method is linear with the number of authorized ciphertexts. This will incur storage burden for the tester. To solve the aforementioned problem, we propose the concept of PKEET supporting partial authentication (PKEET-PA). We then instantiate the concept to a ....

Cloud Storage , Data Sharing , Quality Test , Artial Authorization , Public Key Encryption ,