Cryptography – Electronic game using cryptography
Reexamination Certificate
2001-11-29
2008-08-05
Vu, Kimyen (Department: 2135)
Cryptography
Electronic game using cryptography
C726S026000, C726S027000, C726S028000, C713S150000, C380S284000, C380S285000
Reexamination Certificate
active
07409061
ABSTRACT:
Methods and Systems for securely distributing software in a subscription-based environment are provided. In an example embodiment, a Game Security Facility (“GSF”) associated with a game server is used to manage secure communications with game clients. The GSF typically manages secure communication of the accounting and billing information and secure communication of game session data. In typical operation, the game client generates a pass-phrase that transparently includes a unique identifier of the machine upon which the subscription software will reside. RSA-type key pairs that are then generated using this pass-phrase will be associated uniquely with both the game player and with the machine upon which the software resides, thus preventing unauthorized copying to another machine or unauthorized use by a third party. A public key generated using this pass-phrase is forwarded to the GSF, which uses it to generate a unique one-time random session key (for use as a symmetric key) for each session with the game client. The session key is then encrypted for the game client using the public key of the client. Session data, including the original game files downloaded upon successfully subscribing, are then transmitted between the game server and the game client using encrypted versions of the session key. In one embodiment, the game client can upgrade the machine upon which the subscription data resides, cause the session keys to be reissued using a new public key, and retain access to previously downloaded data.
REFERENCES:
patent: 5201000 (1993-04-01), Matyas et al.
patent: 5539822 (1996-07-01), Lett
patent: 5717756 (1998-02-01), Coleman
patent: 5946664 (1999-08-01), Ebisawa
patent: 5982898 (1999-11-01), Hsu et al.
patent: 6036601 (2000-03-01), Heckel
patent: 6058397 (2000-05-01), Barrus
patent: 6099408 (2000-08-01), Schneier et al.
patent: 6196920 (2001-03-01), Spaur
patent: 6226618 (2001-05-01), Downs et al.
patent: 6424718 (2002-07-01), Holloway
patent: 6447396 (2002-09-01), Galyean et al.
patent: 6508710 (2003-01-01), Paravia et al.
patent: 6599194 (2003-07-01), Smith et al.
patent: 6616533 (2003-09-01), Rashkovskiy
patent: 6792113 (2004-09-01), Ansell et al.
patent: 6928414 (2005-08-01), Kim
patent: 6954728 (2005-10-01), Kusumoto
patent: 7024690 (2006-04-01), Young et al.
patent: 2001/0034661 (2001-10-01), Ferreira
http://en.wikipedia.org/wiki/MMORPG (last visit Mar. 21, 2005).
Arkin et al, “How we Learned to Cheat in Online Poker: A Study in Software Security”, published 1999.
Cortright, “What is a ‘bulk encryption key?’”Newsgroups: comp.groupware.lotus-notes.admin, Jul. 28, 1999.
Intihar, B., “OLA Offers New Form of Advertising,” GameWeek Online, Oct. 2, 2000, 2 pages.
Christensen O'Connor Johnson & Kindness PLLC
Noatak Software LLC
Pich Ponnoreay
Vu Kimyen
LandOfFree
Method and system for secure distribution of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for secure distribution of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for secure distribution of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4001356