For over a year this blog has failed to deliver on an essential promise — that there would someday be pictures of dachshunds. Today we deliver.

This is Callie (short for Calliope) working her way through a bit of summer crypto reading:

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But sometimes that’s exhausting and you’ve gotta take a break.

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A visit from a strange metallic dachshund:

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Summer:

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And in memoriam, Zoe and Sophie, who helped me start this blog.

 

I'm a cryptographer and professor at Johns Hopkins University. I've designed and analyzed cryptographic systems used in wireless networks, payment systems and digital content protection platforms. In my research I look at the various ways cryptography can be used to promote user privacy.