Method and apparatus for secure token generation

Patent metadata

Field	Value
Publication number	US-11743048-B2
Application number	US-202117473172-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Aug 30, 2019
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

Methods and apparatuses are described herein for improved communications between a service and end devices via a gateway. A token may be in a signed encrypted state when sent to untrusted devices and may be signed, but not encrypted, when used by trusted devices. Untrusted devices may receive the encrypted token and may use it to access services. An untrusted device may send the received encrypted token to the gateway, which may then send the token to its issuer so that the token issuer may decrypt the data payload. The token may then be sent back to the gateway, which may then read the decrypted data and verify whether the untrusted device is permitted to access the requested service. The gateway may then send, within the trusted domain, the request and token to the service provider so that the untrusted device can obtain access to the requested service.

First claim

The invention claimed is:

1. A method comprising:
receiving, from a first computing device communicating in an untrusted system, information comprising:
a request for a service; and
a token comprising a signature and encrypted data;

sending, to a second computing device that generated the token and that communicates in a trusted system, the token;
receiving, from the second computing device and based on the encrypted data, decrypted data indicating that the first computing device has permission to access the service; and
sending, to a third computing device communicating in the trusted system and based on a determination that the first computing device has permission to access the service, the request for the service.

2. The method of claim 1 , wherein the second computing device is associated with a service provider providing network access and security to the first computing device and the third computing device.

3. The method of claim 1 , wherein the third computing device is associated with a third party service or cloud platform.

4. The method of claim 1 , wherein the encrypted data was encrypted using a first key, and wherein the first key is encrypted using a second key to generate an encrypted first key.

5. The method of claim 4 , wherein the token further comprises a header comprising the encrypted first key.

6. The method of claim 4 , wherein the first key is a random content encryption key (CEK).

7. The method of claim 4 , wherein the encrypted first key comprises an encrypted content encryption key (eCEK).

8. The method of claim 4 , wherein the second key is a public key.

9. The method of claim 4 , wherein the token further comprises a Uniform Resource Locator (URL) providing a link to a public key certificate associated with the signature.

10. The method of claim 1 , wherein the encrypted data comprises information indicating at least one of:
permissions of the first computing device,
account information of the first computing device, or
capabilities of the first computing device.

11. A method comprising:
receiving, from a first computing device communicating in an untrusted system, information comprising:
a request for sensitive data; and
a token comprising a signature and encrypted data;

sending, to a second computing device that generated the token and that communicates in a trusted system, the token;
receiving, from the second computing device and based on the encrypted data, decrypted data indicating that the first computing device has permission to access the sensitive data; and
sending, to a third computing device communicating in the trusted system and based on a determination that the first computing device has permission to access the sensitive data, the request for sensitive data.

12. The method of claim 11 , wherein the second computing device is associated with a service provider providing network access and security to the first computing device and the third computing device.

13. The method of claim 11 , wherein the third computing device is associated with a third party service or cloud platform.

14. The method of claim 11 , wherein the encrypted data was encrypted using a first key, and wherein the first key is encrypted using a second key to generate an encrypted first key.

15. The method of claim 14 , wherein the token further comprises a header comprising the encrypted first key.

16. The method of claim 11 , wherein the encrypted data comprises information indicating at least one of:
permissions of the first computing device,
account information of the first computing device, or
capabilities of the first computing device.

17. A method comprising:
receiving, by a first computing device communicating in a trusted system and based on a request for a service from a second computing device communicating in an untrusted system, a token comprising a signature and encrypted data;
determining, by the first computing device and based on the encrypted data, that the second computing device has permission to access the service; and
sending, by the first computing device, decrypted data indicating that the second computing device has permission to access the service to cause sending, to a third computing device communicating in the trusted system, the request for the service.

18. The method of claim 17 , wherein the first computing device is associated with a service provider providing network access and security to the second computing device and the third computing device.

19. The method of claim 17 , wherein the third computing device is associated with a third party service or cloud platform.

20. The method of claim 17 , wherein the encrypted data was encrypted using a first key, and wherein the first key is encrypted using a second key to generate an encrypted first key.

Assignees

• Comcast Cable Comm Llc

Inventors

• Haque Asad
• Al Tamimi Ahmad
• Long Liesheng
• Hughes Iii Thomas

Classifications

• H04L9/3213 Primary

  using tickets or tokens, e.g. Kerberos (network architectures or network communication protocols for entities authentication using tickets in a packet data network H04L63/0807) · CPC title

• H04L9/3247

  involving digital signatures · CPC title

• H04L9/3263

  involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements (network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network H04L63/0823) · CPC title

• H04L63/10

  for controlling access to devices or network resources · CPC title

• H04L63/062 Primary

  for key distribution, e.g. centrally by trusted party (cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819) · CPC title