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Title: [HOT] SATOSHIDICE - Negative rolls bug. User makes around 15+ BTC from 1k satos Post by: Watoshi-Dimobuto on November 07, 2014, 03:59:30 AM A user made around 10 to 30BTC after setting a negative client seed resulting in negative rolls.
Negative rolls: Saw a large streak of bets winning. But when i reloaded, it disappeared because of losing bets. There were more than 10 winning bets. Couldn't take pic. http://i.gyazo.com/3acd8dc7027b2a6cc5da3a0e5069a8e5.png http://i.gyazo.com/5fd9e24228a4b15cf95983d67fc7951b.png by user: https://satoshidice.com/user/0564cdf5ebb432a770e0ade6e6e06c5c http://i.gyazo.com/65df9bef9c2e159cd4a7aa508e9d64c8.png The issue has not occured again. The user had topped almost all the leaderboards. i requested to remove it, and immediately it was removed. idk whether it was a coincidence. The support doesn't respond. Only if there was no max win. :p Title: Re: [HOT] SATOSHIDICE - Negative rolls bug. User makes around 15+ BTC from 1k satos Post by: best360noscope on November 07, 2014, 06:05:08 AM what does this mean? were they hacked?
Title: Re: [HOT] SATOSHIDICE - Negative rolls bug. User makes around 15+ BTC from 1k satos Post by: RHavar on November 07, 2014, 07:26:05 AM SatoshiDice asks you for a client seed, and then adds it to their server seed, modulos it by some number to generate the roll result. Instead of picking a positive client seed, someone picked a negative client seed, which invalidates the scheme as it shifts down the range. If the seed is negative enough, the roll will even be negative. Negative is less than any target, so the bet always won.
In short, SatoshiDice didn't validate the client seed, which their scheme requires it to do. Title: Re: [HOT] SATOSHIDICE - Negative rolls bug. User makes around 15+ BTC from 1k satos Post by: best360noscope on November 07, 2014, 10:16:52 AM SatoshiDice asks you for a client seed, and then adds it to their server seed, modulos it by some number to generate the roll result. Instead of picking a positive client seed, someone picked a negative client seed, which invalidates the scheme as it shifts down the range. If the seed is negative enough, the roll will even be negative. Negative is less than any target, so the bet always won. In short, SatoshiDice didn't validate the client seed, which their scheme requires it to do. wow that seems like a huge mess up, especially given that they are one of the most well known btc gambling sites... Title: Re: [HOT] SATOSHIDICE - Negative rolls bug. User makes around 15+ BTC from 1k satos Post by: asdlolciterquit on November 07, 2014, 11:07:32 AM why can you roll a negative number?
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