1. A method comprising: reading a classification level of a secured file from a header portion of the secured file; and decrypting, by a computing machine, a file key using a clearance key, in response to a security clearance level of the clearance key being greater than or equal to the classification level of the secured file, wherein the file key is encrypted in a portion of the secured file, and wherein at least two user identifiers are assigned a security clearance level corresponding to the security clearance level of the clearance key, the at least two user identifiers are thereby granted access to use the clearance key, and represent members of a group of users assigned to the security clearance level, and access to use the clearance key is granted to members in the group, such that members in the group can access the secured file with the clearance key.