Browse Prior Art Database

Encryption keys based on MAC addresses

IP.com Disclosure Number: IPCOM000012678D
Original Publication Date: 2003-May-20
Included in the Prior Art Database: 2003-May-20
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Abstract

This invention disclosure prevents a user from purchasing a downloaded data for one time use and transferring it to another system by encrypting the data with a two part key: MAC address of the computer and companies unique secret key.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 99% of the total text.

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Encryption keys based on MAC addresses

There exist the ability to purchase a movie for one time use that's downloaded to a computer or cable box. Along with the video data, most downloads come with the video player. Companies that offer this service want to prevent the customer from copying the downloaded video for unlimited play time. This invention disclosure enables a downloaded video to only be able to be played on the system that downloaded it. This invention disclosure prevents a user from purchasing a downloaded video for one time use and playing a copy of it on another system.

Each network adapter has a unique MAC address. Each player sent along with movie/data is encrypted per user. When the video and player are downloaded the encryption is based on a two part key. The MAC address is first part of the key and the player has the second half of the secret key. The key has two parts because the MAC address must be sent to the company therefore to verify that the MAC address has not been hacked the company also adds a unique secret key to the player.

Before the player plays the video, the player first verifies that the system's MAC address is the correct MAC address to decrypt the video. This ties the player and video to the MAC address of the computer or cable box that is attempting to start it. If the system's MAC address is different then the MAC address used to encrypt the data then the player cannot play the video.

Disclosed by International Business Ma...