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COMETv1, by Gueron, Jha and Nandi, is a mode of operation for nonce-based authenticated encryption with associated data functionality. It was one of the second round candidates in the ongoing NIST Lightweight Cryptography Standardization Process. ...$\mathsf{}$$\mathsf{}$$\mathsf{}$$\mathsf{}$

This paper proposes a lightweight short-tweak tweakable blockcipher (tBC) based authenticated encryption (AE) scheme tHyENA, a tweakable variant of the high profile NIST LWC competition submission HyENA. tHyENA is structurally similar to HyENA, ...

In the modern era, lots of resource-constrained devices have exploded, creating security issues that conventional cryptographic primitives cannot solve. These devices are connected to an unsecured network such as internet. These lightweight ...

In CRYPTO 2018, Russell, Tang, Yung and Zhou (RTYZ) introduced the notion of crooked indifferentiability to analyze the security of a hash function when the underlying primitive is subverted. They showed that the n-bit to n-bit function ...$\mathrm{}\mathrm{}$$\mathrm{}{}^{\mathrm{}}$

A large proportion of modern symmetric cryptographic building blocks are designed using the Substitution-Permutation Networks (SPNs), or more generally, Shannon’s confusion-diffusion paradigm. To justify its theoretical soundness, Dodis et al. (...

Tweakable block cipher (TBC), a stronger notion than standard block ciphers, has wide-scale applications in symmetric-key schemes. At a high level, it provides flexibility in design and (possibly) better security bounds. In multi-keyed ...

The linear layer, which is basically a binary non-singular matrix, is an integral part of cipher construction in a lot of private key ciphers. As a result, optimising the linear layer for device implementation has been an important research ...

The area is one of the most important criteria for an S-box in hardware implementation when designing lightweight cryptography primitives. The area can be well estimated by the number of gate equivalent (GE). However, to our best knowledge, there ...

Several studies on the resource estimation of quantum key search attack exploiting Grover on different symmetric ciphers have been studied in state-of-the-art cryptology research. In this paper, we consider the popular Feedback Shift Register (FSR)...${\mathrm{}}^{\mathrm{}}\mathsf{}$

This paper discusses how to analyze the probing security of masked symmetric primitives against the leakage effects from Faust et al. in CHES 2018; glitches, transitions, and coupling effects. This is illustrated on several architectures of ...

The field of post-quantum cryptography aims to develop and analyze algorithms that can withstand classical and quantum cryptanalysis. The NIST PQC standardization process, now in its third round, specifies ease of protection against side-channel ...$\mathrm{}$$\mathrm{}$

Threshold Implementations have become a popular generic technique to construct circuits resilient against power analysis attacks. In this paper, we look to devise efficient threshold circuits for the lightweight block cipher family SKINNY. The ...

In this paper we analyze the 5G standard cipher Espresso against differential fault attack. The attack outcome results in a complete internal state recovery by injecting only 4 random faults into the state of the keystream generation phase of ...

Differential fault attacks are powerful techniques to break a cryptographic primitive, where the adversary disrupts the execution of a calculation to find a secret key. Those attacks have been applied in Elliptic Curve Cryptography under various ...

NIST’s PQC standardization process is in the third round, and a first final choice between one of three remaining lattice-based key-encapsulation mechanisms is expected by the end of 2021. This makes studying the implementation-security aspect of ...

Delegating heavy computations to auxiliary servers, while keeping the inputs secret, presents a practical solution for computationally limited devices to use resource-intense cryptographic protocols, such as those based on isogenies, and thus ...

Key-oblivious encryption (KOE) is a promising cryptographic primitive that randomizes the public keys of an encryption scheme in an oblivious manner. It has applications in designing accountable tracing signature (ATS) that facilitates the group ...

We propose a provably secure Identity-Based Signature (IBS) scheme in the multivariate quadratic (MQ) setting. Our construction utilizes the 3-pass identification scheme (IDS) and salted-UOV scheme (of Sakumoto et al. Crypto 2011, PQCrypto 2011). ...

Identity-based matchmaking encryption (IB-ME) is a generalization of identity-based encryption where the sender and the receiver can both specify a target identity: If both the chosen target identities match the one of the other party, the ...

A forward-secure public-key encryption (PKE) scheme prevents eavesdroppers from decrypting past ciphertexts in order to mitigate the damage caused by a potential secret key compromise. In prior works, forward security in a non-interactive setting, ...

In a typical ride-hailing service, the service provider (RS) matches a customer (RC) with the closest vehicle (RV) registered to this service. Ride-hailing services have gained tremendous popularity over the past years, and several works have been ...