As not only the amount of data stored digitally in computers but our dependency of these data, too, increases day by day it is of critical importance to prevent unathorized data accesses. To gain access to other parties' data and, on the other hand, make it as hard as possible is (and has always...

Our age is called information age which shows the importance of any kind of data. Because of this one should protect their (digital) data to prevent unauthorized entities accessing them. Since the data being managed in a database can have a high value unauthorized entities may somehow find their...

Our age is called information age which shows the importance of any kind of data. Because of this one should protect their (digital) data to prevent non-wanted entities accessing them.This is a permanent problem of enterprises and private persons as well. The technical prerequisites are given...

The dramatic spreading of mobile devices (smartphones and tablets) brings new information security risks and threats. These have to be taken seriously because they are weakening not just our personal security but the security of the organisations too. The security of organisations is mainly...

Users can be authenticated by three different ways: on the basis of what they know (password/pin), or what they have (smartcard etc.), or what they are (biometrics). The price and complexness of these methods increases in this order. One would think that the more complex or more expensive a...