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In cloud-computing services, using the SSL/TLS protocol is not enough to ensure data confidentiality. For instance, cloud service providers can see the plaintext after the decryption at the end point of a secure channel. It is wise to introduce an encryption layer between the service client and the communication channel so the data will not be seen by the(More)
Ciphertext-Policy Attribute-Based Encryption (CP-ABE) is suitable for data access control on a cloud storage system. In CP-ABE, the data owner encrypts data under the access structure over attributes and a set of attributes assigned to users is embedded in user’s secret key. A user is able to decrypt if his attributes satisfy the ciphertext’s access(More)
ICN/CCN advocates ubiquitous in-network caching to enhance content distribution. Non-safety application in vehicular communication is emerging beyond the initial safety application. However, it suffers from a typical issue of low delivery ratio in urban environments, where high buildings block and attenuate the radio propagation from RSU infrastructures as(More)
Packet classification is an essential function in Internet routers that provides advanced network services such as virtual private networks (VPNs) and quality of service (QoS). Decision tree-based packet classification algorithms such as HiCuts and HyperCuts allow the tradeoff between storage and throughput in the experimental result with the real life(More)
Digital time-stamp is a component for making a digital evidence of data. It proves that there has been a data since a particular time, and the data has not been falsified after time-stamping. A PKI-based time-stamping scheme is standardized in RFC3161. In the scheme, Time Stamping Authority (TSA), which is a trusted third party, issues a digital time-stamp(More)