公开(公告)号：US20200076828A1

公开(公告)日：2020-03-05

申请号：US16118699

申请日：2018-08-31

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar NAINAR ,  Carlos M. PIGNATARO ,  Luca MUSCARIELLO ,  Alberto COMPAGNO ,  Giovanna CAROFIGLIO

IPC: H04L29/06 ,  H04L9/30 ,  H04L9/32 ,  H04L29/12

Abstract: An electronic device of a content producer generates a chunk of data, associates a location-independent name with the chunk of data, generates a signature for the chunk of data, attaches the signature to the chunk of data, and transmits the chunk of data, with the signature attached, to one or more user devices in response to respective requests. The signature is generated based on the data in the chunk, using a private key of the electronic device. The electronic device also stores information, including a specification of a public key associated with the private key, in a first ledger entry of a blockchain, to provide the one or more user devices with access to the public key. A user device may obtain the public key and use it to verify the chunk of data.

公开(公告)号：US20200036689A1

公开(公告)日：2020-01-30

申请号：US16044672

申请日：2018-07-25

Applicant: Cisco Technology, Inc.

Inventor： Alberto COMPAGNO ,  Michele PAPALINI ,  Luca MUSCARIELLO ,  Giovanna CAROFIGLIO

IPC: H04L29/06 ,  H04L9/32

Abstract: In various implementations, a network device receives a packet from a content producer. The packet includes data and further includes a signature generated by the content producer, based on the data, using a private key of the content producer. The network device modifies the packet without affecting the signature and forwards the modified packet toward a user device. The network device also sends the user device a manifest specifying how the packet was modified. The user device receives the packet and manifest, restores the packet's original data based on the manifest, and verifies the original data using the signature and a public key corresponding to the private key of the content producer. In response to verification of the original data, an application on the user device is allowed to use the data.