We will present how the computation of Hilbert quasi-polynomials of a non-standard graded ring leads to verifying whether a given code is an order domain or not. A class of them is the so-called order domain codes. In this seminar, we will show how commutative and computer algebra are exploited to address different problems arising from coding theory and cryptography.Ī research area in coding theory is the family of algebraic geometric codes, which are known to achieve good performance. Commutative algebra applied to coding theory and cryptography (part 2) Carla Mascia, Università di Trento This is joint work with Linsheng Liu, Austin Theriault and Arkady Yerukhimovich.
We present and carefully analyze the probabilistic performance of our data structure, provide a precise security definition and proof, and then measure the accuracy and scalability of our scheme via experimentation. Our main technical contribution is a new collaborative counting Bloom filter, a simple construction with difficult probabilistic analysis, which may have independent interest as a privacy-preserving randomized count sketch data structure.Ĭompared to prior work on message flagging and tracing in end-to-end encrypted messaging, our novel contribution is the addition of a high threshold of multiple complaints that are needed before a message is audited or flagged. Our system is private, meaning it does not reveal anything about the senders or contents of messages which have received few or no complaints secure, meaning there is no way for a malicious user to evade the system or gain an outsized impact over the complaint system and scalable, as we demonstrate excellent practical efficiency for up to millions of complaints per day. Our FACTS system tracks user complaints on messages obliviously, only revealing the message's contents and originator once sufficiently many complaints have been lodged.
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The challenge we address is how to combat the viral spread of misinformation without compromising privacy. At the same time, encrypted messaging systems such as WhatsApp, Signal, and Telegram, are rapidly gaining popularity as users seek increased privacy in their digital lives. Recent years have seen a strong uptick in both the prevalence and real-world consequences of false information spread through online platforms. Les séminaires ECO et ESCAPE ont lieu le mercredi à 13h30 en salle de séminaire du LIRMM (bâtiment 4).Ĭontacts : Romain Lebreton, Andrei Romashchenkoįighting Fake News in Encrypted Messaging with the Fuzzy Anonymous Complaint Tally System (FACTS) Dan Roche, US Naval Academy
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