| 摘要 |
Methods and data processing apparatuses are provided which enable controlling, from one data processing apparatus, access to data held (for example on a queue) at another data processing apparatus. When a requester wishes to access data held at a local data processing apparatus, a request must be sent to a remote data processing apparatus to determine the security attributes of the data (for example, retrieving queue attributes from a database). The requestor cannot access the data until the security attributes are fully determined at the local data processing apparatus, and since communication with a remote system is required to make this determination the remote apparatus is able to log the requests for data access. The security attributes are preferably an identifier of a cryptor used in compression, a compressor used in compression and an authenticator for authenticating the requestor. The determination of security attributes is preferably required to be repeated for each requester session, with the attributes being deleted from the local data processing apparatus at the end of a session and the requestor being unable to view or save the attributes. This enables session-specific access control. |
