Abstract: In some embodiments, a system may comprise a database and one or more servers. The database may, for example, store a plurality of content claims for previously evaluated data items, with each of the plurality of content claims being associated in the database with a corresponding stored digital fingerprint of a previously evaluated data item. The server(s) may, for example, be configured to receive a determined digital fingerprint of a data item from a client device on another network node, to submit a query to the database using the determined digital fingerprint as a primary key, and to transmit one or more content claims returned by the query to the client device. In some embodiments, the server(s) may be further configured to receive the content claim(s) and the digital fingerprint associated therewith from one or more computers on another network node, and to cause the received content claim(s) and digital fingerprint associated therewith to be stored in the database.

Abstract: In some embodiments, a system may comprise a database and one or more servers. The database may, for example, store a plurality of content claims for previously evaluated data items, with each of the plurality of content claims being associated in the database with a corresponding stored digital fingerprint of a previously evaluated data item. The server(s) may, for example, be configured to receive a determined digital fingerprint of a data item from a client device on another network node, to submit a query to the database using the determined digital fingerprint as a primary key, and to transmit one or more content claims returned by the query to the client device. In some embodiments, the server(s) may be further configured to receive the content claim(s) and the digital fingerprint associated therewith from one or more computers on another network node, and to cause the received content claim(s) and digital fingerprint associated therewith to be stored in the database.

Abstract: Stale information is removed by a removal process so as to enhance the performance of a networked system. The networked system comprises a stored piece of information that has an accessed timestamp for defining the start of a stale period, which comprises a non-updating period preceding a decaying period. The networked system further comprises the removal process for removing the stored piece of information that has become stale because the stale period has expired and the stored piece of information has not been accessed during the decaying period.

Abstract: Permissions using a namespace is described. In an embodiment, a namespace system includes a network resource that has a resource permission, and includes a namespace that has one or more members associated with the namespace. The namespace system also includes a namespace permission to permission the network resource to one or more of the members of the namespace.

Abstract: Stale information is removed by a removal process so as to enhance the performance of a networked system. The networked system comprises a stored piece of information that has an accessed timestamp for defining the start of a stale period, which comprises a non-updating period preceding a decaying period. The networked system further comprises the removal process for removing the stored piece of information that has become stale because the stale period has expired and the stored piece of information has not been accessed during the decaying period.