초록 ▼

A portable storage medium is used to store data and provide access to information from an information dissemination system (IDS). The storage medium can store one or more location/key pairs. Each of the location/key pairs designates a particular IDS location as well as an access key to the particula

A portable storage medium is used to store data and provide access to information from an information dissemination system (IDS). The storage medium can store one or more location/key pairs. Each of the location/key pairs designates a particular IDS location as well as an access key to the particular IDS location. The storage medium can also store a plurality of information units. The information units are categorized into levels of information categories with at least one information category per level and at least one information unit per information category. Levels of information categories can be individually accessed and categories of information units within levels can be selectively downloaded.

대표청구항 ▼

[ What is claimed is:] [1.] A method comprising:accessing a machine-readable data structure stored on a smart card, said machine-readable data structure comprising a plurality of information units, each of said plurality of information units being associated with at least one of a plurality of infor

[ What is claimed is:] [1.] A method comprising:accessing a machine-readable data structure stored on a smart card, said machine-readable data structure comprising a plurality of information units, each of said plurality of information units being associated with at least one of a plurality of information categories, said machine-readable data structure further comprising a directory of the plurality of information categories;satisfying a first level of security associated with the directory;retrieving the directory;selecting at least one of the information categories from the directory;satisfying a second level of security associated with selected information categories; anddownloading information units associated with the selected information categories.