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2 Fundamenta Informaticae

2 2018

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An Efficient Construction of Quantum Attack Resistant Proxy Re-Encryption Based on (Semi) group Factorization Problems

Wang L., Li J., Gu L., Yan J., Qu Z.

Fundamenta Informaticae

2018

Vol. 157, nr 1/2

47--62

Proxy re-encryption (PRE) enables a semi-trusted proxy to transfer Alice's secrets into Bob's secrets but without seeing the secrets. This functionality is very interesting for making balance between the information confidentiality and the mutual accessibility in various scenarios such as public cloud storage systems. During the past decades, many smart PRE schemes were built based on intractability assumptions such as integer factorization problems (IFP) and discrete logarithm problems (DLP). However, Shor's efficient quantum algorithms for IFP and DLP stand great threats towards the security baseline of these schemes. Enlightened by Gu et al.'s recent work on resisting known quantum attacks, we propose an efficient PRE scheme based on the intractability of the (semi)group factorization problems in this paper. The security of the proposed scheme is analyzed according to some heuristic attacks. Moreover, a special instantiation technique is present in detail, and some illustrations are provided for manifesting the effectiveness and efficiency of the proposed methodology.

A Secure Data Forwarding Protocol for Data Statistic Services in Multi-Hop Marine Sensor Networks

Wei L., Zhang K., Zhang L., Huang D.

Fundamenta Informaticae

2018

Vol. 157, nr 1/2

63--78

Homomorphic encryption always allows the linear arithmetic operations performed over the ciphertext and then returns equaling results as if the operations are taken over the original plaintext, which is always used for data aggregation in wireless sensor networks to keep the confidentiality of the data and cut down the transmission overhead of the ciphertext. In the marine sensor networks, sensors collect the multiple data such as temperature, salinity, pressure, and chlorophyll concentration in the ocean using a single hardware unit for further statistical analysis such as computing the mean and the variance and making regression analysis. However, directly using the homomorphic encryption cannot perform well in marine sensor data forwarding since the data need to turn to satellites or vessels as relays and be forwarded in multi-hop way. The data are not expected to be decrypted until arriving the final destinations. To tackle these issues, we design a secure data forwarding protocol based on the Paillier homomorphic encryption and multi-use proxy re-encryption. We also evaluate the computational overhead in term of the delay in the transmission and operation in various test beds. The experiment results show that the additional computational overhead brought by cryptographic operations could be minor and it has the merit of providing fixed data size passing through the multi-hop transmission.