Abstract
The cloud computing and the Internet of Things (IOT) applications provide great benefits for human's life. A large amount of IOT data is outsourced to cloud servers to reduce data management overhead. However, IOT data is vulnerable to various attacks during transmission, such as forgery or tampering attacks. Therefore, ensuring the authenticity of data is one of the fundamental security requirements in IOT environments. Identity-based signature scheme is a cryptosystem that protects data authenticity for IOT. However, most identity-based signature schemes do not offer an efficient user revocation mechanism. Hence, designing revocable identity-based signature (RIBS) schemes for resource-constrained IOT devices has become one of the most focused research trends. In this paper, we propose a secure and efficient RIBS scheme for IOT devices in which the revocation functionality is outsourced to a semi-trusted cloud server. The analysis results show that our RIBS scheme not only keeps the authenticity of IOT data, but also outperforms other RIBS schemes in terms of computational performance.
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