Remote access system, remote access method, and medium containing remote access program

• US 20050086493A1
• Filed: 08/26/2004
• Published: 04/21/2005
• Est. Priority Date: 09/10/2003
• Status: Active Grant

• Current Assignee: Melco Holdings Incorporated
• Original Assignee: Melco Holdings Incorporated
• Inventors: Ishidoshiro, Takashi
• Granted Patent: US 7,401,229 B2
• Time in Patent Office: Days
• US Class Current: 713/182
• CPC Class Codes: G06F 21/34 involving the use of external additional devices, e.g. dongles or smart cards
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32

Abstract

To protect a password from leakage, it is necessary to change it frequently, which is troublesome and difficult to be done realistically. According to the present invention, an encrypted access code is stored in a transportable and nonvolatile memory on the part of a computer to be remotely accessed. When a user actually carries the nonvolatile memory to plug it into a computer remotely accessing, remote access is established between the computer to be remotely accessed and the computer remotely accessing.

Claims

1. A remote access system comprising a pair of computers, one being connected with the other at least by way of radio transmission in a network;

wherein said one computer has an access code registered with it for allowing remote access, is capable of accommodating a transportable and removable nonvolatile memory, encrypts said access code by a prescribed method, and stores it in the nonvolatile memory; and

wherein said the other computer is capable of accommodating said nonvolatile memory, decrypts said encrypted access code when the nonvolatile memory is plugged into it, and accesses said other computer by using the decrypted access code.

2. A remote access system according to claim 1, wherein said nonvolatile memory is a SmartMedia card.

3. A remote access system according to claim 1, wherein said nonvolatile memory is a USB memory.

4. A remote access system according to claim 1, wherein said one computer is installed in a motor vehicle.

5. A remote access system according to claim 4, wherein said access code is at least based on a vehicle identification number.

6. A remote access system according to claim 1, wherein said other computer'"'"'s access code is based on an individual identification number of its CPU.

7. A remote access system according to claim 1, wherein said other computer is a home server in which music data are stored.

8. A remote access system according to claim 1, wherein said pair of computers are connected with each other through a home network system.

9. A remote access system according to claim 1, wherein said pair of computers are connected with each other through the Internet.

10. A remote access system according to claim 1, wherein said access code is generated at random when said nonvolatile memory is removed and is stored in both said one computer and said nonvolatile memory.

11. A remote access system according to claim 1;

wherein each of said pair of computers stores each of a first pair of key data in which data encrypted by using one key data cannot be decrypted without using the other key data;

wherein one computer encrypts said access code by using the one key data and stores it in said nonvolatile memory; and

wherein the other computer decrypts said access code by using the other key data.

12. A remote access system according to claim 11;

wherein, when remotely accessing said one computer, said other computer encrypts said access code by using said other key data and sends it out; and

wherein said one computer decrypts the encrypted access code by using said one key data, compares the access code stored in advance with the access code received, and conducts authentication.

13. A remote access method of a network system in which a pair of computers capable of accommodating a mutually transportable and removable nonvolatile memory are connected at least by way of radio transmission;

wherein one computer has an access code registered with it for allowing remote access, encrypts the access code by a prescribed method, and stores it in said nonvolatile memory; and

wherein the other computer decrypts said encrypted access code when the nonvolatile memory is plugged into it, and makes it possible to access said one computer by using the decrypted access code.

14. A medium containing a remote access program for a network system in which a pair of computers capable of accommodating a mutually transportable and removable nonvolatile memory are connected at least by way of radio transmission;

wherein one computer has an access code registered with it for allowing remote access, and achieves a function of encrypting the access code by a prescribed method and storing it in said nonvolatile memory; and

wherein the other computer achieves a function of decrypting said encrypted access code when the nonvolatile memory is plugged into it, and accessing said one computer by using the decrypted access code.