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Graphical password
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<p>A graphical password or graphical user authentication is a form of <a href="/facts/Authentication/64y4S69b">authentication</a> using <a href="/facts/Image/hbjEdTXK">images</a> rather than <a href="/facts/Letter_(alphabet)/uRnrbGIJ">letters</a>, <a href="/facts/Numerical_digit/JJdLBoGT">digits</a>, or <a href="/facts/Special_characters/2RM5p7kg">special characters</a>. The type of images used and the ways, in which users interact with them vary between implementations. </p>