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Identity-Based Encryption with Filtered Equality Test for Smart City Applications

School of Information Engineering, Chang’an University, Xi’an 710064, China
Author to whom correspondence should be addressed.
Sensors 2019, 19(14), 3046;
Received: 22 May 2019 / Revised: 6 July 2019 / Accepted: 9 July 2019 / Published: 10 July 2019
(This article belongs to the Special Issue Security and Privacy in Internet of Things)
PDF [1444 KB, uploaded 10 July 2019]


With the growth of the urban population, the rapid development of smart cities has become the focus of urban regional development. Smart medical care is an indispensable part of smart city construction, which promotes the development of the medical industry. However, the security of data and timely service are the current problems faced by intelligent medical systems. Based on the public key encryption with filtered equality test and identity-based cryptography, an identity-based encryption with the filtered equality test (IBE-FET) is proposed for smart healthcare, in which a data receiver can use the private key and the message set to generate a warrant and send it to the cloud server. A cloud server can verify the equality between ciphertexts without decryption and check whether the encrypted message belongs to the same message set. Furthermore, the security analysis shows that the proposed scheme satisfies one-way security against the chosen identity and ciphertext attack in the random oracle model under the computational bilinear Diffie-Hellman assumption. The performance comparison shows that the scheme is feasible and practical in real life. View Full-Text
Keywords: smart healthcare; identity-based encryption; filtered equality test; random oracle model smart healthcare; identity-based encryption; filtered equality test; random oracle model

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Ming, Y.; Wang, E. Identity-Based Encryption with Filtered Equality Test for Smart City Applications. Sensors 2019, 19, 3046.

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