Document Type : Research Paper


1 University of Science and Technology, Sudan.

2 Sudan Academy for Banking &Financial science, Sudan


Automatic Revocation means performing the revocation task automatically by the proxy Re-Encryption (PRE), without any command from the data owner. For the lack of survey studies that tackle the automatic Revocation Process, this paper demonstrates a rich survey on the recent auto-revocation schemes proposed by the research community. To accomplish the survey, a literature review methodology, which includes seven steps, is followed. The study concluded with the following results: clarifying the concept of automatic revocation identifying the current proposed automatic revocation schemes, classifying the proposed automatic user revocation schemes, and presenting suggestions of future research directions for revocation schemes.