Increased communication security

• US 10,237,260 B2
• Filed: 07/26/2017
• Issued: 03/19/2019
• Est. Priority Date: 03/31/2014
• Status: Active Grant

• Current Assignee: Idaax Technologies Private Limited
• Original Assignee: Idaax Technologies Private Limited
• Inventors: Sharma, Vishnu
• Primary Examiner(s): Zand, Kambiz
• Assistant Examiner(s): Kaplan, Benjamin A
• Application Number:
  US15/660,910
• Publication Number:
  US 20170324725A1
• Time in Patent Office: 601 Days
• Field of Search: 726 5, 713151, 713181
• CPC Class Codes: H04L 51/00 User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
• CPC Class Codes: H04L 51/212 using filtering or selective blocking
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/166 at the transport layer
• CPC Class Codes: H04L 63/168 above the transport layer
• CPC Class Codes: H04L 9/3242 involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC

Abstract

A system may include a first computer system and a second computer system. The first computer system may be configured to generate a Constrained Application Protocol (CoAP) message including authentication data and message data. The first computer system may be further configured to communicate the CoAP message for delivery to the second computer system. The second computer system may be configured to perform message validation based on the authentication data.

Claims

1. A system comprising:

a first computer system; and

a second computer system,

wherein said first computer system is configured to generate a Constrained Application Protocol (CoAP) message including authentication data and message data, and wherein said first computer system is further configured to communicate said CoAP message for delivery to said second computer system, and

wherein said second computer system is configured to perform message validation based on said authentication data, wherein said second computer system is configured to determine that said CoAP message is invalid if at least one condition is not met, wherein said at least one condition includes whether a payload of said CoAP message is at least a predetermined size, and wherein said second computer system is configured to perform, if said CoAP message is valid, at least one operation associated with said CoAP message.

2. The system of Claim 1, wherein said at least one operation is selected from a group consisting of:

an operation associated with a method code in said CoAP message;

an operation associated with an option in said CoAP message; and

a communication of a second CoAP message, associated with said CoAP message, from said second computer system to said first computer system.

3. The system of Claim 1, wherein said second computer system is configured to perform, if said CoAP message is invalid, at least one other operation associated with said CoAP message.

4. The system of claim 3, wherein said at least one other operation is selected from a group consisting of:

ignoring said CoAP message; and

limiting access of said first computer system to said second computer system.

5. The system of claim 1, wherein said second computer system is further configured to perform said message validation by accessing an authentication mechanism identifier from said message data, and wherein said second computer system is further configured to perform said message validation using an authentication mechanism associated with said authentication mechanism identifier.

6. The system of claim 5, wherein said authentication mechanism is selected from a group consisting of hash-based message authentication code (HMAC) utilizing a MD5 hash function, HMAC utilizing a SHA-1 hash function, HMAC utilizing a SHA256 hash function, HMAC utilizing a SHA512 hash function, OAuth, OAuth 2.0, and OpenID.

7. The system of claim 1, wherein said second computer system is configured to:

generate second authentication data based on at least a portion of said CoAP message; and

compare said second authentication data to said authentication data to determine whether said CoAP message is valid.

8. The system of claim 7, wherein said second computer system is configured to:

access a unique identifier from said CoAP message, wherein said unique identifier is associated with said first computer system;

access a key based on said unique identifier;

generate said second authentication data using said key;

if said second authentication data correlates to said authentication data, determine that said CoAP message is valid; and

if said second authentication data does not correlate to said authentication data, determine that said CoAP message is invalid.

9. The system of claim 7, wherein said second computer system is configured to generate said second authentication data using an authentication mechanism, and wherein said authentication mechanism is associated with an authentication mechanism identifier of said CoAP message.

10. The system of claim 1, wherein said second computer system is configured to:

determine a length of said authentication data based on an authentication mechanism identifier of said CoAP message;

remove a portion of said CoAP message based on said length, wherein said portion of said CoAP message includes at least a portion of said authentication data; and

if said CoAP message is free of said payload responsive to removal of said portion of said CoAP message, remove a payload marker from said CoAP message.

11. The system of claim 1, wherein said at least one condition further includes a condition selected from a group consisting of:

said CoAP message includes a unique identifier associated with said first computer system;

said CoAP message includes a nonce;

a nonce of said CoAP message is different from another nonce associated with a previously-received message; and

a key associated with said first computer system is accessed.

12. The system of claim 1, wherein said second computer system is configured to receive said CoAP message using Datagram Transport Layer Security (DTLS).

13. The system of claim 1, wherein said message data is selected from a group consisting of data associated with a header, data associated with a token, data associated with at least one option, data associated with a payload marker, and data associated with at least a portion of a payload.

14. A system comprising:

a first computer system; and

a second computer system,

wherein said first computer system is configured to generate a Constrained Application Protocol (CoAP) message including authentication data and message data, and wherein said first computer system is further configured to communicate said CoAP message for delivery to said second computer system, and

wherein said second computer system is configured to perform message validation based on said authentication data, wherein said second computer system is configured to determine that said CoAP message is invalid if at least one condition is not met, wherein said at least one condition includes whether said CoAP message includes a unique identifier associated with said first computer system, and wherein said second computer system is configured to perform, if said CoAP message is valid, at least one operation associated with said CoAP message.

15. The system of Claim 14, wherein said at least one operation is selected from a group consisting of:

an operation associated with a method code in said CoAP message;

an operation associated with an option in said CoAP message; and

a communication of a second CoAP message, associated with said CoAP message, from said second computer system to said first computer system.

16. The system of Claim 14, wherein said second computer system is configured to perform, if said CoAP message is invalid, at least one other operation associated with said CoAP message.

17. The system of claim 16, wherein said at least one other operation is selected from a group consisting of:

ignoring said CoAP message; and

limiting access of said first computer system to said second computer system.

18. The system of claim 14, wherein said second computer system is further configured to perform said message validation by accessing an authentication mechanism identifier from said message data, and wherein said second computer system is further configured to perform said message validation using an authentication mechanism associated with said authentication mechanism identifier.

19. The system of claim 18, wherein said authentication mechanism is selected from a group consisting of hash-based message authentication code (HMAC) utilizing a MD5 hash function, HMAC utilizing a SHA-1 hash function, HMAC utilizing a SHA256 hash function, HMAC utilizing a SHA512 hash function, OAuth, OAuth 2.0, and OpenID.

20. The system of claim 14, wherein said second computer system is configured to:

generate second authentication data based on at least a portion of said CoAP message; and

compare said second authentication data to said authentication data to determine whether said CoAP message is valid.

21. The system of claim 20, wherein said second computer system is configured to:

access a unique identifier from said CoAP message, wherein said unique identifier is associated with said first computer system;

access a key based on said unique identifier;

generate said second authentication data using said key;

if said second authentication data correlates to said authentication data, determine that said CoAP message is valid; and

if said second authentication data does not correlate to said authentication data, determine that said CoAP message is invalid.

22. The system of claim 20, wherein said second computer system is configured to generate said second authentication data using an authentication mechanism, and wherein said authentication mechanism is associated with an authentication mechanism identifier of said CoAP message.

23. The system of claim 14, wherein said second computer system is configured to:

determine a length of said authentication data based on an authentication mechanism identifier of said CoAP message;

remove a portion of said CoAP message based on said length, wherein said portion of said CoAP message includes at least a portion of said authentication data; and

if said CoAP message is free of a payload responsive to removal of said portion of said CoAP message, remove a payload marker from said CoAP message.

24. The system of claim 14, wherein said at least one condition further includes a condition selected from a group consisting of:

said CoAP message includes a nonce;

a nonce of said CoAP message is different from another nonce associated with a previously-received message;

a payload of said CoAP message is at least a predetermined size; and

a key associated with said first computer system is accessed.

25. The system of claim 14, wherein said second computer system is configured to receive said CoAP message using Datagram Transport Layer Security (DTLS).

26. The system of claim 14, wherein said message data is selected from a group consisting of data associated with a header, data associated with a token, data associated with at least one option, data associated with a payload marker, and data associated with at least a portion of a payload.