Efficient oblivious transfer with membership verification

tru

Strong identity-based proxy signature schemes, revisited

tru

Efficient Multi-Party Contact Tracing

Since the beginning of the Covid-19 Pandemic, many Countries adopted Contact Tracing Apps as an automatic way to trace if someone has been in contact with a Covid-19 patient. However, most existing solutions consider two party settings only. Since many people meet at the same time in real-life scenarios, one cannot extend current schemes to multi-party settings because they will not scale well and burden the device. In this paper, we propose a new contact tracing protocol that works in a multi-party setting. We evaluate our scheme to show its efficiency.M. de Goyon, A. Miyaji and Y. Tian, "Efficient Multi-Party Contact Tracing," in 2021 Ninth International Symposium on Computing and Networking (CANDAR), Matsue, Japan, 2021 pp. 10-18. doi: 10.1109/CANDAR53791.2021.00010

Editing-enabled signatures: A new tool for editing authenticated data

tru

Leakage-resilient biometric-based remote user authentication with fuzzy extractors

National Research Foundation (NRF) Singapor

Privacy-preserving communication and power injection over vehicle networks and 5G smart grid slice

tru

PriBioAuth: Privacy-preserving biometric-based remote user authentication

National Research Foundation (NRF) Singapor

A new framework for privacy-preserving biometric-based remote user authentication

tru

A new construction for linkable secret handshake

National Research Foundation (NRF) Singapore; AXA Research Fun

A Practical Forward-Secure DualRing

Ring signature allows a signer to generate a signature on behalf of a set of public keys, while a verifier can verify the signature without identifying who the actual signer is. In Crypto 2021, Yuen et al. proposed a new type of ring signature scheme called DualRing. However, it lacks forward security. The security of DualRing cannot be guaranteed if the signer\u27s secret key is compromised. In this work, we introduce forward-secure DualRing. The singer can periodically update his secret key using our proposed ``split-and-combine method to mitigate the security risks caused by the leakage of secret keys. We present a practical scheme based on the discrete logarithm assumption. We show a detailed evaluation to validate its practicality