A new hash-based, server-supported digital signature scheme was proposed recently. We
decompose the concept into forward-resistant tags and a generic cryptographic time …

Attribute-Based Encryption (ABE) is a promising cryptographic primitive which significantly
enhances the versatility of access control mechanisms. Due to the high expressiveness of …

One of the key features that must be supported by every modern PKI is an efficient way to
determine (at verification) whether the signing key had been revoked. In most solutions, the …

We propose a threshold encryption scheme with two-party decryption, where one of the
keyshares may be stored and used in a device that is able to provide only weak security for …

As cloud computing becomes prevalent, more and more sensitive data is being centralized
into the cloud for sharing, which brings forth new challenges for outsourced data security …

Just like PKI, used to support public key certificates, Privilege Management Infrastructure
(PMI) is built to provide a foundation to employ attribute certificates. Although most of the PKI …

The cryptography and steganography can be employed as an appropriate tool for improving
the confidentiality of transmissions over the cloud environment. Several of the prevailing …

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We propose a new digital signature scheme based on combining cryptographic
timestamping with an endorsement scheme, both of which can be constructed from one-way …

Recently the concept of personal PKI was introduced to describe a public key infrastructure
specifically designed to support the distribution of public keys in a personal area network …