A revocable-storage attribute-based encryption (RS-ABE) scheme is an encryption scheme which extends attribute-based encryption by introducing user revocation. A key-policy RS-ABE scheme links each key to an access structure. We propose a new key-policy RS-ABE scheme whose security we prove in term of indistinguishability under a chosen-plaintext attack (IND-CPA).

In this paper, we consider a storage server architecture for multimedia information systems. While most other works on multimedia storage servers assume on-line disk storage [12, 11, 15, 8, 2], we consider a two-tier storage architecture with a robotic tape library as the vast near-line storage and on-line disks as the front-line storage. Magnetic tapes are cheaper, more robust, and have a larg...

We introduce StoDynProg, a small library created to solve Optimal Control problems arising in the management of Renewable Power Sources, in particular when coupled with an Energy Storage System. The library implements generic Stochastic Dynamic Programming (SDP) numerical methods which can solve a large class of Dynamic Optimization problems. We demonstrate the library capabilities with a proto...

ILM and tiered storage system are designed to address the challenge of achieving balance between cost and storage performance. However, both of them are hard to implement fully automatic data migration by traditional solutions for which are mainly relying on administrators experience and need huge manual work for data migration according to storage configuration and IO access patterns. This pap...

Assigning products to and retrieving them from proper storage locations in a unit-load warehouse are crucial in minimizing its operating cost. The problem becomes intractable when the warehouse faces uncertain demand in a dynamic setting. We assume a factor-based demand model in which demand for each product in each period is affinely dependent on some uncertain factors. The distributions of th...

With the development of storage technique, new caching policies are continuously being introduced, which makes it increasingly important for cache systems to select the optimal caching policy dynamically under varying workloads. This paper proposes SOPA, a mechanism to adaptively select the optimal policy and perform policy switching. First, SOPA encapsulates the functions of a caching policy i...

Markov models have traditionally been used to understand the reliability of storage systems. They provide intuition about the sensitivity of storage system reliability to changes in disk failure rates, rebuild rates, sector failure rates, scrubbing rates, and storage capacity. Unfortunately, as we move towards multi-disk fault tolerant storage systems, i.e., storage systems that tolerate two or...