• ABE
• IBE
• IoT
• PBC
• Short Signatures

Pairing-based Cryptography (PBC) is a sub-field of elliptic curve cryptography that has been used to design ingenious protocols including Identity Based Encryption (IBE), Attribute Based Encryption (ABE) and short signatures. This technology has been successfully used in the Internet of Things (IoT), but in 2015 Pairing-Based Cryptography has been found vulnerable against new NFS attacks so that security levels have to be recomputed taking consideration those new threats. As a consequence, all past literature reporting PBC performance on IoT devices must be redone because optimistic, and it is not clear whether present IoT devices will support PBC cryptography. Using RELIC, an efficiency oriented library and taking advantage of asymmetric pairing, we implemented some prominent ABE algorithms on IoT devices, evaluating their feasibility and performances. We also tested IBE and three short signature algorithms. From our experiments, the usage of Identity-Based Encryption and short signatures is still possible on IoT devices, providing up to 128 bits of security strength against modern attacks. Also the implementation of ABE schemes is possible up to 40 attributes, but memory limitations restrict the security strength to 78 bits.