Smart homes are a special use-case of the Internet-of-Things (IoT) paradigm. Security and
privacy are two prime concern in smart home networks. A threat-prone smart home can …

The authentication schemes based on common chip cards such as Mifare cards are still very
popular and are used in various access control systems deployed in critical infrastructure …

We consider the situation, where an adversary may learn the ephemeral values used by the
prover within an identification protocol, aiming to get the secret keys of the user, or just to …

In an ℓ out of n threshold scheme, ℓ out of n members must cooperate to recover a secret. A
kleptographic attack is a backdoor which can be implemented in an algorithm and further …

In this paper we demonstrate effective attacks on Human Identification Protocol with Human-
Computable Passwords (HIPHCP) presented in ISPEC'22. The protocol, which was …

We propose the identity-based signature (IBS) scheme resilient to ephemerals leakage and
setup. The scheme is applicable to scenarios, where signers can not trust thoroughly the …

We present a version of Camenisch-Lysyanskaya's anonymous credential system immune
to attacks based on leakage of ephemeral values used during protocol execution. While …

In extended Key Compromise Impersonation (eKCI) attack against authenticated key
establishment (AKE) protocols the adversary impersonates one party, having the long term …

In this paper, we consider Identification Schemes (IS) in the context of attacks against their
deniability via Fiat-Shamir transformations. We address the following issue: How to design …

The chapter concerns cryptographic schemes enabling to sign digital data in a
pseudonymized way. The schemes aim to provide a strong cryptographic evidence of …