International Journal of Computer Science and Mobile Computing (IJCSMC)
Anonymous profitable transactions can protect the privacy of clients. Some clients prefer to use cash when buying everyday possessions to put off sellers from aggregating in sequence or soliciting them in the future. E-cash are associated to a user's name, and can be used to determine other information, such as address, mobile number, etc. The e-cash system was residential to allow secure anonymous transactions. Many loyalty programs use cards that personally recognize the user tempting in each transaction or that act as a mathematical pseudonym, for use in data mining.