SECURE EFFICIENT REVOCABLE LARGE UNIVERSE MULTI-AUTHORITY ATTRIBUTE-BASED ENCRYPTION FOR CLOUD-AIDED

SECURE EFFICIENT REVOCABLE LARGE UNIVERSE MULTI-AUTHORITY ATTRIBUTE-BASED ENCRYPTION FOR CLOUD-AIDED IOT

With the help of cloud computing, the ubiquitous and diversified Internet of things (IoT) has greatly improved human society. Revocable multi-authority attribute-based encryption (MA-ABE) is considered a promising technique to solve the security challenges on data access control in the dynamic IoT since it can achieve dynamic access control over the encrypted data. However, on the one hand, the existing revocable large universe MA-ABE suffers the collusion attack launched by revoked users and non-revoked users.

ADVANTAGES:

· The proposed MA-ABE supports not only the large attribute-universe but also the large user-universe which implies the flexible number of users. It is suitable for large-scale multi-domain collaboration in the dynamic IoT.

· By improving the cipher text and the data users’ secret key, the proposed scheme is secure against the collusion attack launched by revoked users and non-revoked users.