TPLC: Theory and Practice of Laconic Cryptography

Theory and Practice of Laconic Cryptography Workshop will be co-located with EUROCRYPT 2024 in Zurich, Switzerland scheduled for Saturday, May 25.

Abstract: Laconic cryptography is an emerging paradigm that enables secure computation between potentially many senders and a ‘‘laconic’’ receiver. Abstractly, laconic cryptography can be thought of as a reverse delegation paradigm, where the party that does the computation is also the one that obtains the result. This approach enabled several new results such as identity-based encryption from new assumptions (CDH), rate-1 oblivious transfer, laconic function evaluation, and much more. In addition, techniques from laconic cryptography have been useful to build registration-based encryption (RBE), a new proposal to solve the key escrow problem in identity-based encryption.

This area has matured significantly over the past years, and many new primitives and applications have been proposed. Furthermore, very recent works have shown how to overcome the efficiency drawbacks of the initial constructions, opening the door for schemes that are tantalizingly close to practical. The objective of this workshop is to (i) cover foundational aspects of laconic cryptography, (ii) survey recent developments in the area, and (iii) identify outstanding challenges that remain to make laconic primitives truly practical.