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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Pradyumna Shome, Ph.D. Student
pradyumna.shome@gatech.edu
Summary Sentence: Join us for a student led seminar series about today's security issues
Full Summary: No summary paragraph submitted.
SCP Title CardSpeaker: Akshaya Kumar, Ph.D. Student
Title: Memory-Tight Multi-Challenge Security of Public-Key Encryption
Abstract: We give the first examples of public-key encryption schemes which can be proven to achieve multi-challenge, multi-user CCA security via reductions that are tight in time, advantage, and memory. Our constructions are obtained by applying the KEM-DEM paradigm to variants of Hashed ElGamal and the Fujisaki-Okamoto transformation that are augmented by adding uniformly random strings to their ciphertexts and/or keys. Our proofs for the augmented ECIES version of Hashed-ElGamal make use of a new computational Diffie-Hellman assumption wherein the adversary is given access to a pairing to a random group, which we believe may be of independent interest.
Bio: Akshaya Kumar is a first-year Ph.D. student in Computer Science at the Georgia Institute of Technology's School of Cybersecurity and Privacy where she is advised by Professor Joseph Jaeger. Her research interests include cryptography, information security, and generally, theoretical computer science. Her most recent work focuses on provable security in the memory-aware setting. Her paper on memory-tight proofs for public key encryption schemes was recently accepted at Asiacrypt 2022. She is a part of The Association for Women in Mathematics (AWM), an initiative that promotes women in mathematics.
