Blockchain and Proxy ReEncryption Technology Based Financial Data Sharing Solution

Proxy ReEncryption is proposed as a feasible and efficient cryptographic solution to the naturally occurring cloudbased problem of safe access delegation in this paper. In proxy reencryption, a proxy may switch ciphertexts from one public key to another without needing to decrypt the original plaintext. Therefore, it may be used to delegate decryption privileges, opening up a plethora of new use cases. The growing use of cloudbased file sharing is one such example. Here, we collect and analyze the most important features of current proxy reencryption methods. We test a variety of systems in practice and in theory before drawing conclusions about what works best. Finally, we discuss several concrete applications of proxy reencryption, with an emphasis on safe access delegation in the cloud.