Crypt-DAC is a type of encryption that uses the cloud for dynamic access control

Computer Applications

Crypt-DAC is a system that allows for dynamic access control of unsecured data stored in the cloud. It allows for real cryptographic enforcement by assigning the cloud responsibility to update encrypted data, cancelling access permits, encrypting a file, and so on. In order to provide dynamic access control, we recommend limiting the size of key lists and encryption levels. We also recommend efficiency by instantly revoking access permissions, requiring no expensive decrypt from the administrator side, and by using a formalized framework and system. For many people and organizations, the idea of cryptographically enforcing access control for unsecured data in the cloud is appealing. However, it is still difficult to create dynamic access control for cloud services that are not cryptographically enforceable. Crypt-DAC uses a symmetrical key list for encrypting a file within the system. This symmetrical key list includes both revocation keys and file keys. Each time a revocation occurs, a specific administrator uploads the new revocation key to the cloud. The cloud then updates the encrypted "key list accordingly implemented"

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