In a traditional attribute-based encryption (ABE) system, there is only one central authority
who generates and hence knows the secret keys of all users, this problem is known as the …

Lightweight devices, such as a smartcard associated with a top‐box decoder in pay‐TV or a
SIM card coupled with a powerful (but not totally trusted) smartphone, play an important role …

Secure and efficient enforcement of dynamic access control policies on shared data is a
central problem in dynamic and scalable application scenarios, including the Internet of …

Abstract Standard Broadcast Encryption (BE) and Attribute-Based Encryption (ABE) aim at
sending a content to a large arbitrary group of users at once. Regarding Broadcast …

Abstract At CRYPTO 1994, Cramer, Damgård and Schoenmakers proposed a general
method to construct proofs of knowledge (PoKs), especially for k-out-of-n partial knowledge …

Identity-based cryptography has been introduced by Shamir at Crypto'84 to avoid the use of
expensive certificates in certified public key cryptography. In such system, the identity …

This work is now contributing to creating a system built on the effective sharing of secure
IPFS (Interplanetary file system) for electronic medical records and, in addition …

Aggregate signature scheme allows each signer to sign a different message and then all
those signatures are aggregated into a single short signature. In contrast, multisignature …

In the traditional digital signature scheme, anyone can check the validity of a signer's
signature. However, in some practical applications, such as e-Voting, e-Health, e-Payment …

We address the problem of searching on encrypted data with expressive searching
predicate and multi-writer/multi-reader, a cryptographic primitive which has many concrete …