In many applications, it is desirable to work with signatures that are short, and yet where
many messages from different signers be verified very quickly. RSA signatures satisfy the …

With computer networks spreading into a variety of new environments, the need to
authenticate and secure communication grows. Many of these new environments have …

Key escrow is inherent in identity-based encryption (IBE). A curious key generation center
(KGC) can simply generate the user's private key to decrypt a ciphertext. However, can a …

In an identity-based encryption (IBE) scheme, there is a key extraction protocol where a user
submits an identity string to a master authority who then returns the corresponding secret …

Waters' variant of the Boneh-Boyen IBE scheme is attractive because of its efficency,
applications, and security attributes, but suffers from a relatively complex proof with poor …

The construction of a verifiable random function (VRF) with large input space and full
adaptive security from a static, non-interactive complexity assumption, like decisional Diffie …

We propose an anonymous Hierarchical Identity-Based Encryption (anonymous HIBE)
scheme that has constant size ciphertexts. This means the size of the ciphertext does not …

With computer networks spreading into a variety of new environments, the need to
authenticate and secure communication grows. Many of these new environments have …

We investigate the security of “padding-based” encryption schemes in the standard model.
This class contains all public-key encryption schemes where the encryption algorithm first …

The notion of identity-based encryption (IBE) was proposed as an economical alternative to
public-key infrastructures. IBE is also a useful building block in various cryptographic …