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Sharing encrypted data with different users via public cloud storage is an important research issue. This paper proposes a key-aggregate authentication cryptosystem. The cryptosystem generates a constant-size key that supports flexible delegation of decryption rights for any set of ciphertexts. The key-size is independent of the number of maximum ciphertexts such that the expense of our scheme is...
Cloud computing becomes more and more popular and is applied into many practical applications because of much cheaper and more powerful features. In cloud system, users can outsource local data to the cloud servers to lighten their local storage and computing resource loads, which products a new industry method of use-on-demand, pay-on-use. However outsourcing data to cloud servers makes sensitive...
The MAC layer of 802.15.4 uses the AES-CCM protocol as security mechanism, it uses the AES algorithm as the core, uses CTR mode to ensure confidentiality of data, uses CBC-MAC mode to authenticate the public information of the header in MAC frame. This paper presents an AES hardware accelerator module and two implementations of AES-CCM coprocessor: one for high throughput with parallel AES module...
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