Early optical character recognition may be traced to technologies involving telegraphy and creating reading devices for the blind.[3] In 1914, Emanuel Goldberg developed a machine that read characters and converted them into standard telegraph code.[4] Concurrently, Edmund Fournier d'Albe developed the Optophone, a handheld scanner that when moved across a printed page, produced tones that corresponded to specific letters or characters.[5]
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Wireless attacks: Public WiFi, free WiFi, and personal hotspots on the go have increased the wireless playgrounds that the attackers can target. Attackers can hack into the network and can monitor the traffic in that network or crack the password and use your network for free. Just check the wireless networks that the laptop catches and you can see an example right there!
WPA/WPA2 cracking technique: Our devices have wireless passwords stored so that we do not enter the password on the same device again and again. The attackers take advantage of this by forcefully de-authenticating all the devices on the network. The devices will try to auto-connect to the access point by completing the 4-way handshake. This handshake is recorded and has the hashed password. The hashed password can be brute-forced by using a rainbow table.
AirSnort is free WiFi hacking software that captures the packets and tries to decrypt the keys. The monitoring is done in promiscuous mode and records enough packets to reliably decrypt the key. It is a simple tool and supports both Windows and Linux platforms. Further development and maintenance of this tool has been discontinued but the older version can still be downloaded.
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