Monthly Archives: March 2014

Theoretical Corporate ID card scheme

Holograms are famously hard to duplicate. Here is a scheme to use a hologram in an ID card. Using film, make a hologram of the employee’s bust, with company logo in the shot. Make an ordinary color photo as well. … Continue reading

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International Digital Encryption Algorithm implementation.

The IDEA cipher was subject to an attack more efficient than brute force, in 2012. Despite this, competent researchers still agree that the attack is not yet computationally feasible. If you’re a little nervous, here’s a way to harden your … Continue reading

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