Communication method of administration node, requesting node, and normal node for deleting invalid content using content revocation list in content centric network

Patent metadata

Field	Value
Publication number	US-9723103-B2
Application number	US-201414189538-A
Country	US
Kind code	B2
Filing date	Feb 25, 2014
Priority date	Mar 11, 2013
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

Provided is a communication method for an administration node in a content centric network (CCN). The communication method includes receiving a packet requesting deletion of an invalid content from a requesting node that detects the invalid content, generating a content revocation list including a name of the invalid content and a period of time over which the deletion is to be performed, and flooding a data packet including the content revocation list to the requesting node and a normal node included in the CCN. Also provided are related communications methods for a receiving node and a normal node, as well as the nodes themselves.

First claim

What is claimed is:

1. A communication method performed by an administration node in a content centric network (CNN), comprising:
receiving a packet requesting deletion of an invalid content from a requesting node that detects the invalid content;
generating, in response to the packet requesting deletion of invalid content being received, a content revocation list comprising a name of the invalid content and a period of time over which the deletion request is to be performed, the period of time over which the deletion request is to be performed having a start time and an end time;
transmitting a data packet comprising the content revocation list to the requesting node and a normal node in the CNN
maintaining the content revocation list from the start time of the period of time over which the deletion request is to be performed to the end of the period of time over which the deletion request is to be performed and
deleting the invalid content based on the content revocation list from the contents stored in a content store.

2. The communication method of claim 1 , further comprising: authenticating the requesting node by using a digital signature in the packet requesting deletion of the invalid content.

3. The communication method of claim 2 , wherein the generating of the content revocation list further comprises generating the content revocation list in response to the authentication of the requesting node using the digital signature being successful.

4. The communication method of claim 1 , wherein the packet requesting deletion of the invalid content comprises at least one of a name of the invalid content, an identification (ID) for identifying a control operation to be performed on the invalid content, additional information associated with the control operation, and a digital signature of the requesting node.

5. The communication method of claim 1 , wherein the data packet further comprises at least one of a name of the content revocation list, an identification (ID) for identifying a control operation to be performed on the invalid content, additional information associated with the control operation, and a digital signature of the administration node.

6. The communication method of claim 1 , wherein the administration node is authorized to generate a name of the content revocation list and to create a digital signature in the data packet comprising the content revocation list, and contains a security key.

7. The communication method of claim 1 , wherein the invalid content comprises at least one of a content for which a service is discontinued by a publisher, a content required for modification or update, and a malicious content.

8. The communication method of claim 1 , wherein the period of time over which the deletion request is to be performed comprises a time the content revocation list is maintained at a node that receives the content revocation list.

9. A communication method performed by a requesting node in a content centric network (CNN), comprising:
generating a packet requesting deletion of an invalid content in response to the invalid content being detected;
transmitting the packet requesting deletion of the invalid content to an administration node;
receiving a data packet comprising a content revocation list from the administration node, in response to the transmission;
deleting the invalid content based on the content revocation list, wherein the content revocation list comprises a name of the invalid content and a period of time over which the deletion request to be performed, the period of time over which the deletion request is to be performed having a start time and an end time and
wherein the content revocation list is maintained from the start time of the period of time over which the deletion request is to be performed to the end time of the period of time over which the deletion request is to be performed, and
wherein any instance of the content is deleted between the start time and the end time.

10. The communication method of claim 9 , wherein the data packet further comprises at least one of a name of the content revocation list, an identification (ID) for identifying a control operation to be performed on the invalid content, additional information associated with the control operation, and a digital signature of the administration node, and
the method further comprises certifying that the data packet is generated by the administration node by using the digital signature in the data packet.

11. The communication method of claim 9 , further comprising: transmitting a packet requesting the content revocation list to the administration node; and
receiving a data packet comprising the content revocation list, in response to the request.

12. A communication method performed by a normal node in a content centric network (CNN), comprising:
receiving a data packet comprising a content revocation list in response to invalid content being detected;
deleting a content corresponding to a name in the content revocation list from contents stored in a content store,
wherein the content revocation list comprises a name of an invalid content and a period of time over which the deletion request is to be performed, the period of time over which the deletion request is to be performed having a start time and an end time and
maintaining the content revocation list from the start time of the period of time over which the deletion request is to be performed to the end time of the period of time over which the deletion request is to be performed.

13. The communication method of claim 12 , wherein the data packet further comprises at least one of a name of the content revocation list, an identification (ID) for identifying a control operation to be performed on the invalid content, additional information associated with the control operation, and a digital signature of an administration node, and
the receiving of the data packet comprises receiving the data packet comprising the content revocation list irrespective of whether an entry for the data packet is present in a pending interest table (PIT) in response to the ID for identifying the control operation indicating that a content deletion operation is to be performed on the invalid content.

14. The communication method of claim 12 , further comprising: in response to a case in which after the content is deleted, a content corresponding to a name of the deleted content being received,
deleting the received content without caching when the content having the name of the deleted content is received within the period of time over which the deletion request is to be performed.

15. The communication method of claim 12 , further comprising: receiving a packet requesting deletion of the invalid content from a requesting node.

16. The communication method of claim 15 , wherein the packet requesting deletion of the invalid content comprises at least one of a name of the invalid content, an ID for identifying a control operation to be performed on the invalid content, additional information associated with the control operation, and a digital signature of the requesting node.

17. The communication method of claim 16 , further comprising:
recording a face for flooding the data packet comprising the content revocation list in a pending interest table (PIT) when the ID for identifying the control operation in the packet requesting deletion of the invalid content indicates a content deletion operation to be performed on the invalid content.

18. The communication method of claim 17 , wherein th

Assignees

• Samsung Electronics Co Ltd
• Samsung Electronics Co Ltd

Inventors

• Kim Eun Ah
• Seo Seog Chung
• Hong Seong Ik
• Lee Byoung Joon

Classifications

• H04L63/0823 Primary

  using certificates (cryptographic mechanisms or cryptographic arrangements for entity authentication involving certificates H04L9/3263) · CPC title

• H04L45/32

  Flooding (denial of service attacks H04L63/1458) · CPC title

• H04L63/0876

  based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint · CPC title

• H04L67/32 Primary

  Electricity · mapped topic

• H04L67/327

  Electricity · mapped topic