Patent ID: 7401229

Claim:
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 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.