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This hidden iPhone feature stops spam text messages — try it now

Here s how to stop annoying spam messages on iPhone by using a simple feature called Message Filtering ....

Message Filtering , Known Senders , Unknown Senders , Select All Messages ,

"Lattice-Based Group Encryption with Full Dynamicity and Message Filter" by Jing Pan, Xiaofeng Chen et al.

Group encryption (GE) is a fundamental privacy-preserving primitive analog of group signatures, which allows users to decrypt specific ciphertexts while hiding themselves within a crowd. Since its first birth, numerous constructions have been proposed, among which the schemes separately constructed by Libert et al. (Asiacrypt 2016) over lattices and by Nguyen et al. (PKC 2021) over coding theory are post-quantum secure. Though the last scheme, at the first time, achieved the full dynamicity (allowing group users to join or leave the group in their ease) and message filtering policy, which greatly improved the state-of-affairs of GE systems, its practical applications are still limited due to the rather complicated design, inefficiency and the weaker security (secure in the random oracle model). In return, the Libert et al.’s scheme possesses a solid security (secure in the standard model), but it lacks the previous functions and still suffers from inefficiency because of extremely us ....

Full Dynamicity , Roup Encryption , Attice Cryptography , Message Filtering , Zero Knowledge ,