Self-Updatable Encryption: Time Constrained Access Control with Hidden Attributes and Better Efficiency

Provided by: International Association for Cryptologic Research
Topic: Cloud
Format: PDF
Revocation and key evolving paradigms are central issues in cryptography, and in PKI in particular. A novel concern related to these areas was raised in the recent work of sahai, seyalioglu, and waters (Crypto 2012) who noticed that revoking past keys should at times (e.g., the scenario of cloud storage) be accompanied by revocation of past cipher-texts (to prevent unread cipher-texts from being read by revoked users). They introduced Revocable-Storage Attribute-Based Encryption (RS-ABE) as a good access control mechanism for cloud storage.

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