Method for establishing secure communication link between computers of virtual private network

• US 20040107285A1
• Filed: 11/07/2003
• Published: 06/03/2004
• Est. Priority Date: 10/30/1998
• Status: Active Grant

• Current Assignee: VirnetX Inc. (Virnetx Holding Corporation)
• Original Assignee: Science Applications International Corporation
• Inventors: Larson, Victor, Munger, Edmund Colby, Short, Robert Dunham III, Williamson, Michael
• Granted Patent: US 7,188,180 B2
• Time in Patent Office: Days
• US Class Current: 709/229
• CPC Class Codes: H04L 2101/604 Address structures or formats
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/24 Multipath
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04L 61/35 involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function
• CPC Class Codes: H04L 61/45 Network directories; Name-to-address mapping
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5076 Update or notification mechanisms, e.g. DynDNS
• CPC Class Codes: H04L 61/5092 by self-assignment, e.g. picking addresses at random and testing if they are already in use
• CPC Class Codes: H04L 63/0227 Filtering policies mail message filtering H04L51/212
• CPC Class Codes: H04L 63/0272 Virtual private networks
• CPC Class Codes: H04L 63/0281 Proxies
• CPC Class Codes: H04L 63/029 Firewall traversal, e.g. tunnelling or, creating pinholes
• CPC Class Codes: H04L 63/0414 during transmission, i.e. party's identity is protected against eavesdropping, e.g. by using temporary identifiers, but is known to the other party or parties involved in the communication
• CPC Class Codes: H04L 63/0421 Anonymous communication, i.e. the party's identifiers are hidden from the other party or parties, e.g. using an anonymizer
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/0876 based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 63/1458 Denial of Service
• CPC Class Codes: H04L 63/1491 : using deception as countermeasure, e.g. honeypots, honeynets, decoys or entrapment
• CPC Class Codes: H04L 63/18 : using different networks or channels, e.g. using out of band channels cryptographic mechanisms or cryptographic arrangements for key distribution involving distinctive intermediate devices or communication paths H04L9/0827; cryptographic mechanisms or cryptographic arrangements for authentication using a plurality of channels H04L9/3215

Abstract

A technique is disclosed for establishing a secure communication link between a first computer and a second computer over a computer network. Initially, a secure communication mode of communication is enabled at a first computer without a user entering any cryptographic information for establishing the secure communication mode of communication. Then, a secure communication link is established between the first computer and a second computer over a computer network based on the enabled secure communication mode of communication. The secure communication link is a virtual private network communication link over the computer network in which one or more data values that vary according to a pseudo-random sequence are inserted into each data packet.

Claims

1. A method for accessing a secure computer network address, comprising steps of:

receiving a secure domain name;

sending a query message to a secure domain name service, the query message requesting a secure computer network address corresponding to the secure domain name;

receiving a response message containing the secure computer network address corresponding to the secure domain name; and

sending an access request message to the secure computer network address using a virtual private network communication link.

2. The method according to claim 1, wherein the step of receiving the secure domain name includes steps of:

receiving a command to establish the virtual private network communication link with a secure computer network address corresponding to a predetermined non-secure domain name; and

automatically generating a secure domain name corresponding to the non-secure domain name.

3. The method according to claim 2, wherein the step of receiving a command to establish the virtual private network communication link includes a step of selecting a predetermined icon displayed on a computer display.

4. The method according to claim 1, wherein the response message contains provisioning information for the virtual private network.

5. The method according to claim 4, wherein the virtual private network is based on inserting one or more data values into each data packet sent to the secure computer network address, the one or more data values varying according to a pseudo-random sequence.

6. The method according to claim 4, wherein the virtual private network is based on inserting into at least one data packet at least one data value representing a predetermined level of service associated with the virtual private network.

7. The method according to claim 4, wherein the virtual private network is based on a computer network address hopping regime that is used to pseudorandomly change computer network addresses in packets transmitted between the first computer and the second computer.

8. The method according to claim 4, wherein the virtual private network is based on comparing a value in each data packet transmitted to the secure computer network address to a moving window of valid values.

9. The method according to claim 4, wherein the virtual private network is based on a comparison of a discriminator field in a header of each data packet to the secure computer network address to a table of valid discriminator fields.

10. The method according to claim 1, wherein the computer network includes the Internet.

11. The method according to claim 1, wherein the secure domain name has a top-level domain name that includes one of .scom, .snet, .sorg, .sedu, .smil or .sgov.

23. The method of claim 1, wherein the access request message containing a request for information stored at the secure computer network address.

12. A computer-readable storage medium, comprising:

a storage area; and

computer-readable instructions for a method for accessing a secure computer network address, the method comprising steps of;

receiving a secure domain name;

sending a query message to a secure domain name service, the query message requesting a secure computer network address corresponding to the secure domain name;

receiving a response message containing the secure computer network address corresponding to the secure domain name; and

sending an access request message to the secure computer network address using a virtual private network communication link.

13. The computer-readable medium according to claim 12, wherein the step of receiving the secure domain name includes steps of:

receiving a command to establish the virtual private network communication link with a secure computer network address corresponding to a predetermined non-secure domain name; and

automatically generating a secure domain name corresponding to the non-secure domain name.

14. The computer-readable medium according to claim 13, wherein the step of receiving a command to establish the virtual private network communication link includes a step of selecting a predetermined icon displayed on a computer display.

15. The computer-readable medium according to claim 12, wherein the response message contains provisioning information for the virtual private network.

16. The computer-readable medium according to claim 15, wherein the virtual private network is based on inserting one or more data values into each data packet sent to the secure computer network address, the one or more data values varying according to a pseudo-random sequence.

17. The computer-readable medium according to claim 15, wherein the virtual private network is based on inserting into at least one data packet at least one data value representing a predetermined level of service associated with the virtual private network.

18. The computer-readable medium according to claim 15, wherein the virtual private network is based on a computer network address hopping regime that is used to pseudorandomly change computer network addresses in packets transmitted between the first computer and the second computer.

19. The computer-readable medium according to claim 15, wherein the virtual private network is based on comparing a value in each data packet transmitted to the secure computer network address to a moving window of valid values.

20. The computer-readable medium according to claim 15, wherein the virtual private network is based on a comparison of a discriminator field in a header of each data packet to the secure computer network address to a table of valid discriminator fields.

21. The computer-readable medium according to claim 12, wherein the computer network includes the Internet.

22. The computer-readable medium according to claim 12, wherein the secure domain name has a top-level domain name that includes one of .scom, .snet, .sorg, .sedu, .smil or .sgov.

24. The computer readable medium of claim 12, wherein the access request message containing a request for information stored at the secure computer network address.