Securing a directed acyclic graph
US10164774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2015 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | May 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for securing a directed acyclic graph (DAG) is described. In one embodiment, an algorithm enables encryption of a DAG given a start node (an entrypoint), the node key for that node, and a path to traverse in the graph. A unique and cryptographically random key is generated for each node (sometimes referred herein as a unique node key). The node key encrypts the node it is generated for and also any edges exiting the node. The node key is stored on the incoming edge to the node (the edge from its parent node) encrypted with the node key of the parent node. Storing the keys on the edges of the DAG instead of on nodes of the DAG enables efficient querying of the DAG and the ability for a node to have multiple parents that may change without affecting the node's relationship with the non-changing parents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.