US 11,387,996 B2 · Cable modem anti-cloning

Abstract

Methods, systems, and computer readable media can be operable to facilitate the encryption of a device identifier using an identification property of a Soc. A unique identifier of a cable modem may be encrypted using a unique key or other unique property of a SoC associated with the cable modem. When an authentication process is initiated at the cable modem, the encrypted unique identifier of the cable modem may be decrypted using the unique key or other unique property of the SoC, thereby producing the unique identifier of the cable modem. The decrypted unique identifier of the cable modem may be output from the cable modem to an upstream controller during the authentication process. In embodiments, an obfuscation key may be used to encrypt and decrypt the unique identifier of the cable modem, and the obfuscation key may be generated using a unique identifier of the SoC.

Claims24

Dependent claims

A cable modem for use with an upstream controller, said cable modem comprising:

a memory;
and
a processor configured to execute instructions stored in the memory to:
retrieve a unique identifier associated with the cable modem;
retrieve a seed associated with a component of the cable modem;
produce an encrypted identifier by using the seed to produce an encryption key to encrypt the unique identifier;
store the encrypted identifier in said memory;
conduct an authentication process including:
performing decryption using the seed to produce a decryption key to decrypt the stored encrypted identifier to yield the unique identifier, and using the unique identifier to authorize the cable modem with the upstream controller.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/101,640Filed 23 Nov 2020 · continuation in part

Priority

14 Mar 2016

Published

US 2021/0105137 A18 Apr 2021

Granted

12 Jul 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04L 9/0866
Generation of secret information including derivation or calculation of cryptographic keys or passwords: involving user or device identifiers,…
H04L 9/0869
Generation of secret information including derivation or calculation of cryptographic keys or passwords: involving random numbers or seeds
H04L 9/32
Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols: including means for…
H04L 9/3226
Including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity…: using…

Family

Application62/307,922Us provisional application · filed 14 Mar 2016

Application62/404,804Us provisional application · filed 6 Oct 2016

Application15/458,510Parent of this continuation-in-part · filed 14 Mar 2017

Application16/416,913Parent of this continuation-in-part · filed 20 May 2019

US 10,339,326 B2Parent of this continuation-in-part · filed 2 Jul 2019

US 2021/0105137 A1Pre-grant publication · published 8 Apr 2021

US 10,880,090 B2Parent of this continuation-in-part

US 2017/0262637 A1Published application

US 2019/0273614 A1Published application

US 11,387,996 B2This patent

From the US filing history. Foreign family members aren’t listed.

Cable modem anti-cloning

Life of this patent

Cable modem anti-cloning

Life of this patent

Abstract

Claims24