Use ZMAIL to securely participate in online games. Design your own game, assuring fair rules to all participants; send winning and "cheat" codes that can be opened only when you define. Easily coordinate time, globally.
ZMAIL allows gamers to: (1) set a release time for the email, preventing the bid or move to be used before a pre-defined date; (2) restrict who is allowed to use the bid or move; (3) send bids or moves that will expire ("self-destruct") after a set time; and (4) confirm by a return receipt when, where, how and by whom the bid or move is decrypted.
How does it work?
• Correspondence Chess example: Relaxed and friendly online chess, play a move when you want. Your move can only be opened at the right time, the time you set the Release Time for. Timelimits range from seconds to days per move. Since all ZMails are timestamped, late submissions can be easily detected. You can play many games at the same time or play moves before the timelimit deadlines to speed things up. All you and your opponent need are your ZMAIL accounts.
• Sport Lotto example: Run your own Sport Lotto for your school, parish, organization, office or just for fun. Participants forecast the results for some future game and send their bid by ZMAIL before a final bid date, with the Release Time set for after the game ends. Since all ZMails are timestamped, late submissions can be easily detected and discarded. After the game ends, all ZMails are collected and opened to verify whose forecast matched the actual result. Participants can also request a return receipt confirmation that their forecast was decrypted and opened for reading. Rewarding the winners is facilitated because all participants can be reached back.
• Raffle example: Run your own raffle, for your school, parish, organization, office or just for fun. Send the raffle's tickets to anyone by ZMAIL, with instructions for payment, setting the Expiration Time to the time the raffle submission ends. Collect all ZMails and verify payment. Since all ZMails are timestamped, late submissions can be easily detected and discarded. When the raffle ends, randomly select the winner. Rewarding the winners is facilitated because all participants can be reached back.
ZMAIL timestamps every email that is sent and, when ordered by the user with a command to set release and expiration times, defines a "not-before" and a "not-after" lifetime for the decryption key for that email. ZMAIL works in GMT time and also in local time, automatically, as set in each user's browser. In addition to a logical block preventing an expired key to be used, expired keys are physically destroyed after their lifetime expire. This effectively makes that email permanently unavailable after the set date. Even if the email is still retained on the sender's or recipients' computer, and in network copies or back-up tapes of mail servers, the email can no longer be read after it expires.
With ZMAIL's release and self-destruct features, the sender is able to unilaterally enforce limitations on reading the email in addition to authenticating the message and each recipient of the email. When a game move or bid is sent by ZMAIL, it will be used exactly when desired by the sender. The sender can also request a return receipt confirmation that the move or bid was opened for reading, which is only possible after decryption.
Additional benefits: With ZMAIL, you can use the release time to send your move or bid at the last possible moment. This prevents others from reacting to your strategy before it is too late. Trying to rely on trust or a third-party for this service (as in proxy gaming), may fail due to collusion and internal attacks. Trying to do this by sending the email yourself at that last moment, even if automatically done by your email software, may fail depending on your ISP, your connection speed, and your computer. Rewarding the winners, using ZMAIL with encryption for privacy and security, is facilitated because all senders can be reached back. Each ZMAIL sender must have a verified and operating mailbox when registering for ZMAIL. Anonymous gaming is possible by the use of pseudonyms, if acceptable by the game organizer.