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Application Notes/
Technical Brief
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AN665
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Title:
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Using KEELOQ® to Generate Hopping Passwords
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Name:
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AN665
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Date:
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5/23/11
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Author:
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Lucio Di Jasio
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Description:
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The purpose of this application note is to demonstrate how KEELOQ® code hopping technology can be conveniently employed to implement an automatic code hopping password generator/keypad. Using a PIC12C508, the hopping code produced by an HCS300 is converted to a string of 16 hex digits. This string is then transferred to the PC via the keyboard line, thereby emulating the actual pressure of a sequence of keys on a standard PC/AT ® keyboard. Since this conversion process is transparent to any application, it appears as if the user is simply typing on a PC/AT-type keyboard.
An ideal situation for implementing this application would be in creating a ?super password? for general, access-control secure logins when transmitting information onto the internet (i.e., through a browser) or a Java applet.
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Keywords:
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PIC12C508
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Related Information
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App Notes and Source Code
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AN665
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