1. Introduction -- 2. From Julius Caesar to simple substitution -- 3. Polyalphabetic systems -- 4. Jigsaw ciphers -- 5. Two-letter ciphers -- 6. Codes -- 7. Ciphers for spies -- 8. Producing random ...
Opinion
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Bondi Beach another episode in terror attacks

The horror which took place on Bondi Beach was the replay of a script that has been played out on many occasions. The small worldwide Jewish community has suffered a disproportionate number of such ...
Satya Nadella has stopped hinting and started drawing lines. Inside Microsoft, he is telling senior leaders that artificial ...