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Positioning systems can use signatures hidden in a user's environment to identify a location. Images are often used to locate a place by identifying landmarks. In this work, we present the use of texts in an image to identify a user's location. The key intuition behind this work is that a collection of names of business appearing in an image forms a bag-of-words that provides a unique signature for...
We investigate the strength of patterns as secret signatures in Android's pattern based authentication mechanism. Parallelism of GPU is exploited to exhaustively search for the secret pattern. Typically, searching for a pattern, composed of a number of nodes and edges, requires an exhaustive search for the pattern. In this work, we show that the use of GPU can speed up the graph search, hence the...
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