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Method for authenticating and restoring files Disclosure Number: IPCOM000125957D
Original Publication Date: 2005-Jun-24
Included in the Prior Art Database: 2005-Jun-24
Document File: 1 page(s) / 25K

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Method for authenticating and restoring files

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Method for authenticating and restoring files

Sometimes, when a user downloads a file from a server, over time, the file that the user downloaded has changed. Maybe its name has changed, its timestamp, its source, etc. The problem is that there is no way to guarantee that the file downloaded is what it is. Suppose the user downloaded an mp3 file titled "You're the Inspiration" by Chicago from a friend's server who got it off the internet that originated from When you finally received this file, it was renamed to "Inspiration" by some user. The song's group name along with other information were removed or changed. This file has changed and therefore is not like the original. This disclosure describes a process for authenticating files with a web server, and if the file has changed, restoring the file to its original state.

Provides is a method to authenticate and restore files that originated from a server using a certificate (or key). The key would be created by the authentication server (i.e. and added to the beginning of the file. When a user downloads the file, he runs an application (or plugin for a web browser) that sends the key to the server (i.e. and verifies that the file hasn't been modified based on timestamps and checksum. If the file has been modified, then the file can be restored to the original. Now the user has a file that has been authenticated.

The user can then choose to pass on the certified file containing the key created by or pass on the plain file.

When the user downloads the file,...