公开(公告)号：US20190158296A1

公开(公告)日：2019-05-23

申请号：US16260808

申请日：2019-01-29

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Stuart Haber ,  William G. Horne ,  Miaomiao Zhang

IPC: H04L9/32 ,  G06F16/93 ,  G06F21/64

CPC classification number: H04L9/3247 ,  G06F16/93 ,  G06F21/64 ,  G06F2221/2123 ,  H04L9/3242

Abstract: In one implementation, a redactable document signature system includes an encoding engine, a reordering engine, and a signature engine. The encoding engine is to access a plurality of subdocuments of a document, to generate a plurality of commitment values from the plurality of subdocuments, and to generate a plurality of dummy values. Each dummy value is indistinguishable from a commitment value. The reordering engine is to define an order of the plurality of commitment values and the plurality of dummy values independent of an order of the subdocuments. The signature engine is to calculate a signature value for the document using the plurality of commitment values and the plurality of dummy values according to the order.

公开(公告)号：US10237074B2

公开(公告)日：2019-03-19

申请号：US15302980

申请日：2014-04-08

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Stuart Haber ,  William G. Horne ,  Miaomiao Zhang

IPC: H04L9/32 ,  G06F17/30 ,  G06F21/64

Abstract: In one implementation, a redactable document signature system includes an encoding engine, a reordering engine, and a signature engine. The encoding engine is to access a plurality of subdocuments of a document, to generate a plurality of commitment values from the plurality of subdocuments, and to generate a plurality of dummy values. Each dummy value is indistinguishable from a commitment value. The reordering engine is to define an order of the plurality of commitment values and the plurality of dummy values independent of an order of the subdocuments. The signature engine is to calculate a signature value for the document using the plurality of commitment values and the plurality of dummy values according to the order.

公开(公告)号：US10778441B2

公开(公告)日：2020-09-15

申请号：US16260808

申请日：2019-01-29

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Stuart Haber ,  William G. Horne ,  Miaomiao Zhang

IPC: H04L29/06 ,  H04L9/32 ,  G06F16/93 ,  G06F21/64

Abstract: In one implementation, a redactable document signature system includes an encoding engine, a reordering engine, and a signature engine. The encoding engine is to access a plurality of subdocuments of a document, to generate a plurality of commitment values from the plurality of subdocuments, and to generate a plurality of dummy values. Each dummy value is indistinguishable from a commitment value. The reordering engine is to define an order of the plurality of commitment values and the plurality of dummy values independent of an order of the subdocuments. The signature engine is to calculate a signature value for the document using the plurality of commitment values and the plurality of dummy values according to the order.