Traceable constant-size multi-authority credentials

Introduction (with Credentials of Entomological Authority)

Fair Traceable Multi-Group Signatures

This paper presents fair traceable multi-group signatures (FTMGS), which have enhanced capabilities, compared to group and traceable signatures, that are important in real world scenarios combining accountability and anonymity. The main goal of the primitive is to allow multiple groups that are managed separately (managers are not even aware of the other ones), yet allowing users (in the spirit...

Towards traceable size determination of extracellular vesicles

BACKGROUND Extracellular vesicles (EVs) have clinical importance due to their roles in a wide range of biological processes. The detection and characterization of EVs are challenging because of their small size, low refractive index, and heterogeneity. METHODS In this manuscript, the size distribution of an erythrocyte-derived EV sample is determined using state-of-the-art techniques such as ...

Multi-authority Attribute Based Encryption

In an identity based encryption scheme, each user is identified by a unique identity string. An attribute based encryption scheme (ABE), in contrast, is a scheme in which each user is identified by a set of attributes, and some function of those attributes is used to determine decryption ability for each ciphertext. Sahai and Waters introduced a single authority attribute encryption scheme and ...

Traceable Visual Cryptography Traceable Visual Cryptography

In this paper we present a new k out of n visual cryptography scheme which does not only meet the requirements of the basic visual cryptography scheme deened by Naor and Shamir 5] but is also traceable. With a k out of n scheme it is not possible to reveal the original secret by stacking less than k transparencies. In general one can assume that it is very unlikely that there are k shareholders...