Patent ID: 8561196

Claim:
A method comprising: receiving a mini drive file after a threshold publication time, wherein the mini drive file comprises a plurality of version identifiers (IDs) and a plurality of pointers, each of the plurality of version IDs is associated with one of a plurality of delta definition sets, each of the plurality of delta definition sets comprises update information for a corresponding version of a full signature definition file, and each of the plurality of pointers indicates a corresponding storage area of each of the plurality of delta definition sets; comparing a local version identifier of a local copy of the full signature definition file and the plurality of version IDs, wherein the comparing indicates the local version identifier corresponds to a first delta definition set of the plurality of delta definition sets, the comparing further indicates the local version identifier corresponds to a first pointer of the plurality of pointers, and the first pointer indicates a first storage area configured to provide the first delta definition set; requesting the first delta definition set from the first storage area, in response to the comparing; and updating the local copy of the full signature definition file, wherein the local copy is updated with the first delta definition set, and the local version identifier of the local copy is updated to a current version identifier.