We put forward a new framework that makes it possible to re-write or compress the content
of any number of blocks in decentralized services exploiting the blockchain technology. As …

Chameleon hash functions are collision resistant when only the hashing keys of the
functions are known. In particular, without the knowledge of the secret information, the …

While blockchain is known to support open and transparent data exchange, partly due to its
nontamperability property, it can also be (ab) used to facilitate the spreading of fake and …

The notion of chameleon hash function without key exposure plays an important role in
designing secure chameleon signatures. However, all of the existing key-exposure free …

Bilinear maps, or pairings, initially proposed in a cryptologic context for cryptanalytic
purposes, proved afterward to be an amazingly flexible and useful tool for the construction of …

The blockchain's immutability permits widespread application in untrusted contexts, such as
digital currency, the Internet of Things, and anti-counterfeiting. This functionality, however …

As a promising application scenario of wireless technologies, roaming communication
initiates the demand for secure and efficient handoff authentication schemes. However, it …

Electronic medicine has received more and more attention because of its ability to provide
more efficient and better medical services. However, the characteristics of electronic medical …

Verifiable data streaming (VDS) protocols enable end users with limited storage space to
continuously stream data items to an untrusted cloud server, while preserving the capacity of …

Online/offline identity-based signature (OO-IBS) is an adequate cryptographic tool to provide
the message authentication and integrity in mobile devices, since it lightens the …