Vectorlock Shapelife ArcGIS Extension for Secure Shapefile Data

EMAP International and the Government released VectorLock Par, the first security system for geospatial data, especially shapefile. VectorLock is the extension for ArcGIS 9.3 or 10, which allows you or your company to protect and control access to geospatial data from around the use of data both internally and externally when sharing data. VectorLock ensure the highest possible level of security. Shapefile data are secured and distributed to users through a proprietary encrypted format that looks like a regular shapefile data when added to the ArcGIS. You have the authority to set the time how long the shapefile data can be accessed by clients or partners. If you set time is exceeded, an automatic data can not be accessed again by clients or partners.
VektorLock available in three versions, Standard (free), Advanced (free) and Admin. Version of the standard used to call and display VectorLock files, including changing the symbology. Dementara for Advanced versions, in addition to having all abilities standard version, this version is available Editor toolbar. For the Admin version, there is full functionality to make VectorLock VectorLock files and unlock files.

More info on VectorLock at this link.