We describe a short signature scheme which is existentially unforgeable under a chosen
message attack without using random oracles. The security of our scheme depends on a …

We study the setting in which a user stores encrypted documents (eg e-mails) on an
untrusted server. In order to retrieve documents satisfying a certain search criterion, the user …

We describe a short signature scheme that is strongly existentially unforgeable under an
adaptive chosen message attack in the standard security model. Our construction works in …

We propose a dynamic accumulator scheme from bilinear pairings and use it to construct an
identity-based (ID-based) ring signature scheme with constant-size signatures and to …

We construct a fully collusion resistant tracing traitors system with sublinear size ciphertexts
and constant size private keys. More precisely, let N be the total number of users. Our …

With the rapid development of information technology, Big data has become a hot topic of
research in governments, academia, and enterprises. On the one hand, Big data brings …

Identity-based encryption (IBE) is a special asymmetric encryption method where a public
encryption key can be an arbitrary identifier and the corresponding private decryption key is …

A traitor tracing system enables a publisher to trace a pirate decryption box to one of the
secret keys used to create the box. We present a traitor tracing system where ciphertext size …

We propose a group signature scheme with constant-size public key and signature length
that does not require trapdoor. So system parameters can be shared by multiple groups …

Traitor tracing schemes are of major importance for secure distribution of digital content.
They indeed aim at protecting content providers from colluding users to build pirate …