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hich is validated by the server, then an encrypted challenge is presented by the server, which only the user can decrypt with the private key. Since the users private key is not shared with anyone else, the computer is mathematically certain of the users ident ity. Smart cards are the most common method of storing secret keys for authentication. Knowledge-Based Authentication Banks and ot her financial institutions often use KBA Knowledge Based Authentication to verify a user based on something he knows. Secret quest map icon ionsanswers, pin numbers, and challenge words are common forms of KBA, requiring the user to provide an easily remember-able but u nique answer to the challenge question. Impostors with intimate knowledge of the victim can usually beat KBA, as answers to securi Bio Limousin Moteur de recherche ty questions are usually easy to guess. Biometrics Biometrics are authentication tools to verify a users identity using some physi .

cruits and to check their fingerprints against a database of criminals. Users can occasionally bypass or spoof biometric authentic ation by exploiting a weakness in the underlying technologies, for example, using a picture of the victim to bypass facial recogni tion.1 Click Start, and then click the Control Panel link. Click the Hardware and Sound heading, then click the Sound heading. The Sound Properties window displays on screen. 2 Click the Recording tab. Right-click the Microphone icon, and click the Enable butt newsletter templates on if disabled. 3 Double-click the Microphone icon. The Microphone Properties window displays on-screen. Click the Levels tab, the n click the slider and drag it to the far right. This will set the microphone level at 100 percent. Click the Un-mute button next Bio Limousin Moteur de recherche to the microphone level slider if the microphone is muted. 4 Click the Apply button to confirm the settings, and then click the OK .

sted administrative password and press Enter again to perform the update.1 Click Start and then click the Control Panel link. Clic k the Hardware and Sound heading and then click Device Manger under the Devices and Printers section. The Device Manager window wi ll display on screen. 2 Click the Display Adapters option and then double-click the video device you are updating. The window of y our graphics device displays on screen. 3 Click the Driver tab and then click the Update Driver button. The Update Driver Software ebook com window displays on screen. 4 Click the Search automatically for updated driver software option and let Windows search the Interne t for a newer version of the driver. Click the Close button after Windows installs the latest driver or fails to find a newer driv Bio Limousin Moteur de recherche er than the one in use already. 5 Click the Close button on the graphic driver screen and then close the Device Manager.1 Restart .

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