Война кодов и шифров. История четырех тысячелетий криптографии

To kill any possible sub rosa message, censors sometimes paraphrased messages. This practice gave…

To plug up as many steganographic channels of communication as possible, the Office of Censorship…

Practical cryptanalysis has even been acknowledged at the highest level. The source is none other…

One of the tasks of the secret police is to protect the dictatorship of the proletariat from the…

Then slowly the Russian Command got worried. Wireless calls became frantic. “Report at once where…

An expanded version of the Magia naturalis, in 20 books, recorded many of the experiments of the…

The dreaded change of code, which would have cost the United States her best source of information…