Patent ID: 7512565

Claim:
A method for securing transactions using electronic deposits (purses), comprising: configuring, in an electronic deposit (purse), a grey lock mark being an attribute parameter of the electronic deposit (purse), which identifies the state of the last transaction of the electronic deposit (purse) as being one of complete and incomplete, the grey lock mark being configured to have one of a clear status when the last transaction was completed and a set (grey) status when the last transaction was incomplete, wherein after setting the grey lock mark, all operations to the electronic deposit (purse) except resetting the grey lock mark being invalidated; setting, while staffing a transaction using the electronic deposit (purse), the grey lock mark and recording parameters of the transaction as a locking card source in the electronic deposit (purse); and validating the recorded locking card source before debiting money from the electronic deposit (purse), and if the recorded parameters are validated, debiting money from the electronic deposit (purse) and resetting the grey lock mark simultaneously.