Tencent QQ secret security card, security analysis – Tencent, QQ-office supplies
Tencent Tencent QQ secret security card is introduced by a security service account. It is a record number of eight rows with 10 cards, in the implementation of sensitive operations (such as the transfer of equipment in the fantasy game, modify QQ password), the system prompts the user to enter the password security card number three position, all enter the correct allowed to continue.
As close randomly selected security card for each of three boxes in the figures as a temporary dynamic password, thus, the dynamic password is different every time, even if Daohao Trojans to steal your password input a time, can not use this password to authenticate. QQ secret security card now for free Download Used.
Security products from the point of view, QQ secret security card lock use a similar dynamic technology, but the cost is far lower than the dynamic code lock, but the QQ secret security card security in the end do?
We know, the dynamic password (Dynamic Pass word ), Also known as a one-time password, it refers to the user's password in accordance with the time or the number of dynamic changes constantly, each code is only used once. Dynamic password using a dynamic token called a special hardware, built-in power supply, password generation chips and displays. The figure is the appearance of this product, including the number keys to enter a user PIN code, the display is used to display a one-time password. Enter the correct PIN code each time, are currently available can be a one-time dynamic password.
Theory will, this dynamic one-time password generated by the number of tokens can be massive, repetitive, highly unlikely, therefore, even if hackers and many times the password, can not use this password to phishing the identity of legitimate users, as the next log on you must use another new dynamic password.
However, QQ secret security card, security token to achieve dynamic security level? In the absence of hardware dynamic token, QQ secret security password of the card is not a one-time password, but after a number of recycling, although the cost savings this way, but far less than the dynamic security lock, hackers crack this insurance card or charge density is not much effort to. If a hacker to install a screen and intercept Keyboard Trojan tools, then ten times the interception of the password the user login, you can intercept about half of the QQ secret security card password, then hackers can try their own password to log on through the interception, and with half of the data, basically Try a few times you can hit the last.
Therefore, QQ secret security card does not make QQ login security nature of the changes occurred, in order to achieve true network security, dynamic medium with hardware lock to make the safety and USBKey get a quality breakthrough in terms of cost, USBKey still has considerable advantages, the most expensive USBKey costs have been less than the 20 yuan.
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