Want to protect your sensitive emails? You might want to consider going retro -- and exploiting an unbreakable WWII-style cipher. The Vernam cipher was developed in 1917 by AT&T engineer Gilbert ...

Many cryptographers throughout history have claimed that a particular code is the most-unbreakable ever written. But does a rarely-used code, invented in 1917 and briefly employed during World War II, ...

In a recent TechCrunch article I was quoted calling the one-time pad a “unicorn”. Inevitably, I was roundly criticized. But what none of the commenters (or myself) realized, however, was how ...

plaintext AND to decrypt a ciphertext. That is four operations, and most resources show one. Every sheet here does all four. 8-bit ASCII code is given, and so is the one-time pad’s; the student poses ...

pdf, 66.6 KB pdf, 67.54 KB pdf, 69.11 KB pdf, 68.92 KB txt, 3.98 KB ...