Research Papers

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Isochronous Gaussian Sampling: From Inception to Implementation

We present a framework for Gaussian sampling that is extremely simple, and it is precisely this simplicity that allowed us to make it easy to implement, provably secure, portable, efficient, and provably resistant against timing attacks.

Unifying Leakage Models on a Rényi Day

In this work, we provide new strategies to prove the security of masked implementations.

Exploiting Determinism in Lattice-based Signatures: Practical Fault Attacks on pqm4 Implementations of NIST Candidates

In this paper, we analyze the implementation level fault vulnerabilities of deterministic lattice-based signature schemes.

BEARZ Attack FALCON: Implementation Attacks with Countermeasures on the FALCON Signature Scheme

This research proposes the first fault attack analysis of FALCON and finds its lattice trapdoor sampler is as vulnerable to fault attacks as the GPV sampler used in alternative signature schemes.

Round5: Compact and Fast Post-quantum Public-Key Encryption

We present the ring-based configuration of the NIST submission Round5, a Ring Learning with Rounding (RLWR)- based IND-CPA secure public-key encryption scheme.

More Efficient Algorithms for the NTRU Key Generation Using the Field Norm

This work shows how to speed up key generation for NTRU-based algorithms by 100x.

Anonymous Reputation Systems Achieving Full Dynamicity from Lattices

In this work, we revisit the Anonymous Reputation Systems presented by Blömer et al. in (FC’15).

Shorter Messages and Faster Post-Quantum Encryption with Round5 on Cortex M

Round5 is a Public Key Encryption and Key Encapsulation Mechanism (KEM) based on General Learning with Rounding (GLWR), a lattice problem. We implement Round5 on Cortex M4.

Attribute-Based Signatures for Unbounded Circuits in the ROM and Efficient Instantiations from Lattices

In this work, we affirmatively close the gap between ABS schemes based on bilinear maps and lattices by constructing the first lattice-based ABS scheme for unbounded circuits in the random oracle model.