Patent ID: 8799651

Claim:
A file encryption system comprising: a data store storing a list of applications and types of files that the applications have been granted permission to access and a list of allowable hash values; and a processor configured to receive an access request for an encrypted file by an application; determine if the application is authorized for access to the encrypted file by checking a name of the application and a file type of the encrypted file against the list of applications and types of files that the applications have been granted permission to access; upon determining that the application is authorized to access the encrypted file, further determine if the application is authorized for access to an unencrypted version of the encrypted file by calculating a hash value of contents of the application and checking the calculated hash value against the list of allowable hash values; and upon determining that the application is authorized for access to an unencrypted version of the encrypted file, decrypt the encrypted file and return the decrypted file to the application, otherwise return the encrypted file to the application; wherein the list of applications and types of files that the applications have been granted permission to access and the list of allowable hash values are administered by a security policy.