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No more Reviewer #2: Subverting Automatic Paper-Reviewer Assignment using Adversarial Learning

The number of papers submitted to academic conferences is steadily rising in many scientific disciplines. To handle this growth, …

Thorsten Eisenhofer, Erwin Quiring, Jonas Möller, Doreen Riepel, Thorsten Holz, Konrad Rieck

Generic Models for Group Actions

We define the Generic Group Action Model (GGAM), an adaptation of the Generic Group Model to the setting of group actions (such as …

Julien Duman, Dominik Hartmann, Eike Kiltz, Sabrina Kunzweiler, Jonas Lehmann, Doreen Riepel

Multi-User CDH Problems and the Concrete Security of NAXOS and HMQV

We introduce CorrGapCDH, the Gap Computational Diffie-Hellman problem in the multi-user setting with Corruptions. In the random oracle …

Eike Kiltz, Jiaxin Pan, Doreen Riepel, Magnus Ringerud

FABEO: Fast Attribute-Based Encryption with Optimal Security

Attribute-based encryption (ABE) enables fine-grained access control on encrypted data and has a large number of practical …

Doreen Riepel, Hoeteck Wee

Group Action Key Encapsulation and Non-Interactive Key Exchange in the QROM

In the context of quantum-resistant cryptography, cryptographic group actions offer an abstraction of isogeny-based cryptography in …

Julien Duman, Dominik Hartmann, Eike Kiltz, Sabrina Kunzweiler, Jonas Lehmann, Doreen Riepel

Strongly Anonymous Ratcheted Key Exchange

Anonymity is an (abstract) security goal that is especially important to threatened user groups. Therefore, widely deployed …

Benjamin Dowling, Eduard Hauck, Doreen Riepel, Paul Rösler

Password-Authenticated Key Exchange from Group Actions

We present two provably secure password-authenticated key exchange (PAKE) protocols based on a commutative group action. To date the …

Michel Abdalla, Thorsten Eisenhofer, Eike Kiltz, Sabrina Kunzweiler, Doreen Riepel

Authenticated Key Exchange and Signatures with Tight Security in the Standard Model

We construct the first authenticated key exchange protocols that achieve tight security in the standard model. Previous works either …

Shuai Han, Tibor Jager, Eike Kiltz, Shengli Liu, Jiaxin Pan, Doreen Riepel, Sven Schäge

Analysing the HPKE Standard

The Hybrid Public Key Encryption (HPKE) scheme is an emerging standard currently under consideration by the Crypto Forum Research Group …

Joël Alwen, Bruno Blanchet, Eduard Hauck, Eike Kiltz, Benjamin Lipp, Doreen Riepel

Tightly-Secure Authenticated Key Exchange, Revisited

We introduce new tightly-secure authenticated key exchange (AKE) protocols that are extremely efficient, yet have only a constant …

Tibor Jager, Eike Kiltz, Doreen Riepel, Sven Schäge