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"Quantum-safe Anonymous Hierarchical Identity-Based Encryption with Tra" by Ngoc Ai Van Nguyen and Minh Thuy Truc Pham

Anonymous Identity Based Encryption (AIBET) scheme allows a tracer to use the tracing key to reveal the recipient's identity from the ciphertext while keeping other data anonymous. This special feature makes AIBET a promising solution to distributed IoT data security since it can preserve both the privacy and the anonymity of a communication network but still give the server the ability to revoke the anonymity of some specific users in necessary situations (such as when their illegal behavior are detected). In this paper, we construct an efficient quantum-safe Hierarchical Identity-Based cryptosystem with Traceable Identities (AHIBET) with fully anonymous ciphertexts. We prove the security of our AHIBET scheme under the Learning with Errors (LWE) problem in the standard model. ....

Identity Based Encryption , Hierarchical Identity Based , Traceable Identities , Ierarchical Identity Based Encryption , Dentity Traceability , Awe Problem ,

"Hierarchical Identity-based Puncturable Encryption from Lattices with " by Priyanka Dutta, Mei Jiang et al.

Puncturable encryption (PE), introduced by Green and Miers at IEEE S&P 2015, allows recipients to update their decryption keys to revoke decryption capability for selected messages without communicating with senders. In general, it allows users to control which ciphertexts their keys may decrypt. The notion of PE has been found very useful in many applications, such as asynchronous messaging systems, group messaging systems, public-key watermarking schemes, secure cloud emails, and many more. In this paper, we introduce a new primitive called hierarchical identity-based puncturable encryption (HIBPE) that enhances the concept of PE by allowing more general key delegation and flexible key puncture. It enhances the capability of the data owner for multi-level encrypted data sharing within a group of users by delegating the decryption keys of the users in higher-levels to generate decryption keys for the users in lower-levels. Moreover, it allows users to puncture (update) their decry ....

Forward Security , Ierarchical Identity Based Encryption , Learning With Errors , Uncturable Encryption , Standard Model ,