Researchers Identify ‘Master Problem’ Underlying All Cryptography

In 1868, the mathematician Charles Dodgson (better known as Lewis Carroll) proclaimed that an encryption scheme called the Vigenère cipher was “unbreakable.” He had no proof, but he had compelling reasons for his belief, since mathematicians had been trying unsuccessfully to break the cipher for more than three centuries. There was just one small problem: A German infantry officer named Friedrich…

Source