Monthly Archives: July 2012

Security of the Android Pattern Lock

When my wife and I bought new Android smart phones recently, we sat down together to experiment with configuring and using them.  One interesting feature was the choice of several schemes for locking the screen when the phone is not … Continue reading

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IBM Research Ponder This: July 2012 Puzzle

I like this month’s IBM Research puzzle for several reasons.  First, it is really three puzzles in one, where each component is relatively self-contained.  Second, it has some very “nice” elegant mathematics in it, but will also yield to computer simulation… … Continue reading

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