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Recently, one of the most popular technologies of the modern era, the Internet of Things (IoT) allows the deployment and usage of various real-time test beds for various smart applications. One such application is the e-healthcare in which patients healthcare related data is transmitted to the nearest base station and then to local or remote server as per the requirements. The data related to patients health is sensitive and needs special protection. Therefore, the integrity and authentication of sources of data generation are vital issues. However, several authentication or signature schemes which have been introduced in the past for this purpose are ID-based or having certificate-less settings. Thus, these proposed schemes suffer from key escrow and key distribution problems. To mitigate these issues, this article presents a certificate-based pairing free aggregate signature scheme. The proposed scheme uses the merits of public key cryptography (PKC) and identity based public key cryptography (IDBPKC). The scheme is proven to be unforgeable, assuming the hardness of ECDLP. The performance analysis shows that proposed CBPFAS scheme executes in 0.78(n + 1) m in comparison to 9.63 + 1.17n m in [1], 9.63 + 0.78n m in [2], 9.63 + 3.39n m in [3] and 9.63 + 1.17n m in [4].

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