A Collusion-Resistant Identity-Based Proxy Reencryption Scheme with Ciphertext Evolution for Secure Cloud Sharing

<div>Computation time of updating 100 MB to 1 GB ciphertext in SHB and proposed scheme.</div>

Security and Communication Networks

Figure 5: A Collusion-Resistant Identity-Based Proxy Reencryption Scheme with Ciphertext Evolution for Secure Cloud Sharing 