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US 7,073,056 B2Granted
Apparatus and method for demonstrating and confirming the status of digital certificates and other data
AssigneeTumbleweed Communications Corp.
InventorPaul Carl Kocher
Life of this patent
Estimating the term…
Abstract
Methods and apparatuses for providing cryptographic assurance based on ranges as to whether a particular data item is on a list.
Claims1
A computer-based method of generating an interval hash tree, for use in an electronic communications protocol for generating a cryptographically assured confirmation that a candidate data item does not belong to a plurality of data items, without including all of said data items in said confirmation, comprising the steps of:
- (a) storing in a memory device, a plurality of data items;
- (b) deriving a plurality of leaf nodes from said data items;
- (c) generating an interval hash tree by associating, said leaf nodes with a plurality of intermediate nodes and at least one root node;
- and
- (d) digitally signing said at least one root node.
2 more elements
Dependencies are inferred from the claim text.