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A lightweight encryption technique with low storage overheads is essential to secure data access from Resrouce-Constrained Devices (RCD). It must protect against unsolicited users with scalable user revocation with uninterrupted access to valid users. A user must be able to access RCD over low-energy wireless communication interfaces through a user reader device (mobile). Attribute-based encryption is an efficient technique for securely sharing sensitive data with multiple stakeholders without the requirement of sharing multiple security keys. This paper proposes a novel ECC-based scalable user revocation (EASER) ciphertext policy attribute-based encryption (CP-ABE) encryption scheme to secure and selectively share data from RCD with multiple stakeholders. It is based on ECC, with lower decryption time and constant-sized secret keys with low storage overhead. EASER extends Odelu et al.'s ECC-based CP-ABE scheme for scalable user revocation and mitigates a proven key-collusion attack. It is suitable for securing RCD and provides secure, selective access from a user reader device.

Efficient ECC-Based CP-ABE Scheme With Constant-Sized Key and Scalable User Revocation