An information obtaining system in a vehicle is provided. The information obtaining system includes a nonvolatile memory built into the vehicle, vehicle information relating to the vehicle being stored in the nonvolatile memory; a portable reader device which is not incorporated into the vehicle and can be carried by a person, the portable reader device being configured to read out the vehicle information from the nonvolatile memory, encrypt the vehicle information, and store the encrypted vehicle information, and being capable of outputting the encrypted vehicle information; and an analyzing device which is not incorporated into the vehicle, the analyzing device being separate from the portable reader device, and configured to decrypt the encrypted vehicle information output from the portable reader device into the vehicle information.