Fine-Grained Forward Secure Firmware Update in Smart Home

Qiuxia Zhao (), Dong Zheng (), Yinghui Zhang and Yan Ren
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Qiuxia Zhao: College of Computer, Qinghai Normal University, Xining 810008, China
Dong Zheng: National Engineering Research Center for Secured Wireless, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
Yinghui Zhang: National Engineering Research Center for Secured Wireless, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
Yan Ren: Maths and Information Technology School, Yuncheng University, Yuncheng 044000, China

Mathematics, 2023, vol. 11, issue 14, 1-16

Abstract: Although the vigorous development of smart homes brings great convenience to people’s lives, smart homes usually suffer from various security threats due to firmware vulnerabilities. Firmware update is a possible solution, but existing methods cannot address the security issues during the update process well. To enable secure firmware updates, a Forward Secure Firmware Update (FSFU) system was realized based on the proposed Puncturable-Ciphertext Policy-Attribute-Based Encryption (P-CP-ABE) scheme. In FSFU, when the service provider delivers the latest firmware, it specifies an access policy and some tags to encrypt the data and appends its signature to achieve both fine-grained access control and authentication. Authorized customers can obtain the latest firmware by decrypting the encrypted data through their private key. In particular, after a successful update, each authorized customer can realize forward security by updating his/her puncturable key, which is an important private key component. In addition, FSFU is further enhanced by outsourcing a part of the parameters and computational tasks. Finally, FSFU was proven to be secure under the Decisional Bilinear Diffie–Hellman (DBDH) assumption. Our proposed FSFU is efficient from both the theoretical analysis and the experimental results.

Keywords: firmware update; forward secure; fine-grained access; authentication; outsourcing (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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