公开(公告)号：US20200320204A1

公开(公告)日：2020-10-08

申请号：US16374364

申请日：2019-04-03

Applicant: Cisco Technology, Inc.

Inventor： Jeffrey C. VENABLE, SR. ,  Ramanathan JAGADEESAN

IPC: G06F21/60 ,  H04L9/06 ,  H04L9/32 ,  G06F21/62

Abstract: The present disclosure provides an approach for a blockchain system in which (a) data of past transactions can be removed from the storage of network nodes based on node permissions, and (b) in which data can be made invisible to users based on user-specific or group-specific permissions. The blockchain system stores cryptographic proofs of data on an immutable ledger. The data itself is maintained within the blockchain system such that it can be partially or fully removed, while maintaining the integrity of the ledger.

公开(公告)号：US20220035937A1

公开(公告)日：2022-02-03

申请号：US17450839

申请日：2021-10-14

Applicant: Cisco Technology, Inc.

Inventor： Jeffrey C. VENABLE, SR. ,  Ramanathan JAGADEESAN

IPC: G06F21/62 ,  H04L9/32 ,  H04L9/06

Abstract: The present disclosure provides an approach for a blockchain system in which (a) data of past transactions can be removed from the storage of network nodes based on node permissions, and (b) in which data can be made invisible to users based on user-specific or group-specific permissions. The blockchain system stores cryptographic proofs of data on an immutable ledger. The data itself is maintained within the blockchain system such that it can be partially or fully removed, while maintaining the integrity of the ledger.

公开(公告)号：US20210083882A1

公开(公告)日：2021-03-18

申请号：US16571981

申请日：2019-09-16

Applicant: Cisco Technology, Inc.

Inventor： Jeffrey C. VENABLE, SR.

IPC: H04L9/32 ,  H04L9/06

Abstract: The present disclosure provides an approach for a certificate authority (CA) that is distributed among nodes of a network, such that only a portion of the network nodes are required to sign and issue a digital certificate. Each node of the network includes a partial private key, the partial private key having been obtained by sharding the full private key. The sharding may be performed by a process known in the art, such as Shamir Secret Sharing and Distributed Key Generation. Systems that are inherently distributed may use the techniques herein to create a CA that is not centralized. The techniques herein leverage a database in the form of a distributed blockchain to store issued certificates and status of the certificates.