Attention: Lack of Knowledge is Costly! Statistics presented by police departments in many countries around the world show that computer crimes are increasing fast, and these crimes can affect you. 47% of the total cybercrimes in Iran were related to unauthorized withdrawals from people's bank accounts. Cybercrimes in Germany rose to a record level in 2013 to 64,500 cases, but only one in four crimes are solved. In addition, police unions believe that as many as 90 percent of internet crimes go unreported. These statistics show that there is a necessity to remind users of the common practices of committing cyberspace crimes

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