Remote access system, remote access method, and medium containing remote access program
First Claim
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1. A remote access system, comprising:
- a pair of computers, with a first computer coupled with a second computer at least by way of radio transmission in a network;
said first computer has an access code registered with it for remote access, is capable of accommodating a transportable and removable nonvolatile memory, encrypts said access code by a prescribed method, and stores said access code in the nonvolatile memory; and
said second computer is capable of accommodating said nonvolatile memory, decrypts said encrypted access code when the nonvolatile memory is plugged into the second computer, and accesses said first computer by using the decrypted access codeeach of said pair of computers stores each of a first pair of key data in which data encrypted by using a first key data cannot be decrypted without using a second key data;
the first computer encrypts said access code by using the first key data and stores it in said nonvolatile memory; and
the second computer decrypts said access code by using the second key data;
when remotely accessing said first computer, said second computer encrypts said access code by using said second key data and sends it out; and
said first computer decrypts the encrypted access code by using said first key data, compares the access code stored in advance with the access code received, and conducts authentication.
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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.
18 Citations
12 Claims
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1. A remote access system, comprising:
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a pair of computers, with a first computer coupled with a second computer at least by way of radio transmission in a network; said first computer has an access code registered with it for remote access, is capable of accommodating a transportable and removable nonvolatile memory, encrypts said access code by a prescribed method, and stores said access code in the nonvolatile memory; and said second computer is capable of accommodating said nonvolatile memory, decrypts said encrypted access code when the nonvolatile memory is plugged into the second computer, and accesses said first computer by using the decrypted access code each of said pair of computers stores each of a first pair of key data in which data encrypted by using a first key data cannot be decrypted without using a second key data; the first computer encrypts said access code by using the first key data and stores it in said nonvolatile memory; and the second computer decrypts said access code by using the second key data; when remotely accessing said first computer, said second computer encrypts said access code by using said second key data and sends it out; and said first computer decrypts the encrypted access code by using said first key data, compares the access code stored in advance with the access code received, and conducts authentication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A remote access method of a network system, comprising:
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coupling a pair of computers capable of accommodating a mutually transportable and removable nonvolatile memory at least by way of radio transmission; a first computer has an access code registered with it for remote access, encrypts the access code by a prescribed method, and stores the access code in said nonvolatile memory; and a second computer decrypts said encrypted access code when the nonvolatile memory is plugged into the second computer, and makes the second computer possible to access said first computer by using the decrypted access code each of said pair of computers stores each of a first pair of key data in which data encrypted by using a first key data cannot be decrypted without using a second key data; the first computer encrypts said access code by using the first key data and stores it in said nonvolatile memory; and the second computer decrypts said access code by using the second key data; when remotely accessing said first computer, said second computer encrypts said access code by using said second key data and sends it out; and said first computer decrypts the encrypted access code by using said first key data, compares the access code stored in advance with the access code received, and conducts authentication.
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12. 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, comprising:
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a first computer that has an access code registered with it for remote access, and achieves a function of encrypting the access code by a prescribed method and storing the access code in said nonvolatile memory; and a second computer achieves a function of decrypting said encrypted access code when the nonvolatile memory is plugged into said second computer, and accessing said first computer by using the decrypted access code each of said pair of computers stores each of a first pair of key data in which data encrypted by using a first key data cannot be decrypted without using a second key data; the first computer encrypts said access code by using the first key data and stores it in said nonvolatile memory; and the second computer decrypts said access code by using the second key data; when remotely accessing said first computer, said second computer encrypts said access code by using said second key data and sends it out; and said first computer decrypts the encrypted access code by using said first key data, compares the access code stored in advance with the access code received, and conducts authentication.
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Specification