Apparatus for identifying a requesting individual who wishes to receive a computer file, or to input or alter computer information, where identifying information for each of a plurality of registered individuals allowed such access is stored in a database, calls for capturing images of such requesting individual, and determining whether this individual is the same as a registered individual. The stored identifying information includes both an alphanumeric identifier and images of a unique, identifier of each registered individual. The specificity of the identification is enhanced by providing and storing, by apparatus situated at the information source, a code which is converted to a code-image and displayed in proximity to the requesting individual; by obtaining composite images of both the biologic identifier and the code-image; by comparing the obtained image information with stored image information; and by providing computer access only if the obtained image information matches stored image information.