Optimizing data cache when applying user-based security

A secure caching method in a system connected to a user and a data source, said data source having defined access rights based on a security context of users, the method comprising:

• receiving a user request including a security context and a data identifier;
• checking in a list storage for the presence of a list identified by the security context and the data identifier;
• and
• if the list is not present, creating a list in the list storage identified by the security context and the data identifier, retrieving data from the data source, and storing the retrieved data in a data storage, and populating the created list with addresses of storage of the retrieved data stored in the data storage;
• and
• if the list is present, retrieving data from the data storage using the storage addresses in said list.

A caching system comprising:

• a processor executing software modules;
• and
• a memory storing the software module,
• wherein the software modules comprise:
• a receiver module which receives a user request for data and a security context;
• a search module which searches a cache for the requested data based on the user request and the received security context;
• a management module which obtains the cached data in response to the user request if the requested data is found in the cache, and
• wherein if the requested data is not found in the cache, the management module obtains the requested data from a data source, stores the obtained data in the cache and associates the obtained data with the security context, and returns the requested data in response to the user request.

A computer readable medium storing instructions for secure caching, the instructions comprising:

• receiving a user request for data and a security context;
• searching a cache for the requested data based on the user request and the received security context;
• if the requested data is found in the cache, returning the cached data in response to the user request, and
• if the requested data is not found in the cache, obtaining the requested data from a data source, storing the obtained data in the cache and associating the obtained data with the security context.