Quotes About Cryptography

He stopped, because he wasn't sure what Cryptography had established, and because he needed another moment to haul himself down from the ledges of her high cheekbones, to retreat from the caves of her eyes.

Los números primos son útiles para crear códigos y en Estados Unidos los consideran Material Militar y si descubres uno de más de 100 dígitos tienes que decírselo a la CIA y te lo compran por 10.000 dólares. Pero no sería una forma demasiado buena de ganarse la vida.

Rejewski had no idea of the day key, and he had no idea which message keys were being chosen, but he did know that they resulted in this table of relationships. Had

quantum cryptography is a system that ensures the security of a message by making it hard for Eve to read accurately a communication between Alice and Bob. Furthermore, if Eve tries to eavesdrop then Alice and Bob will be able to detect her presence. Quantum cryptography therefore allows Alice and Bob to exchange and agree upon a onetime pad in complete privacy, and thereafter they can use this as a key to encrypt a message.

Previous experience, however, tells us that every so-called unbreakable cipher has, sooner or later, succumbed to cryptanalysis

Quantum cryptography would mark the end of the battle between codemakers and codebreakers, the codemakers emerging victorious, because quantum cryptography is a truly unbreakable system of encryption.

the Vigenère cipher belongs to a class known as polyalphabetic, because it employs several cipher alphabets per message. The polyalphabetic nature of the Vigenère cipher is what gives it its strength, but it also makes it much more complicated to use. The additional effort required in order to implement the Vigenère cipher discouraged many people from employing it.

Quantum cryptography is an unbreakable system of encryption.

Al-Kindi's technique, known as frequency analysis, shows that it is unnecessary to check each of the billions of potential keys. Instead, it is possible to reveal the contents of a scrambled message simply by analysing the frequency of the characters in the ciphertext.

had the cipher machines been used properly—without repeated message keys, without cillies, without restrictions on plugboard settings and scrambler arrangements, and without stereotypical messages which resulted in cribs—it is quite possible that they might never have been broken at all.

A large amount of identically encrypted material provides a cryptanalyst with a correspondingly larger chance of identifying the key.

it can be mathematically proved that it is impossible for a cryptanalyst to crack a message encrypted with a onetime pad cipher. In other words, the onetime pad cipher is not merely believed to be unbreakable, just as the Vigenère cipher was in the nineteenth century, it really is absolutely secure

Figure 6 The science of secret writing and its main branches.

I recall thinking that this paper would be the least interesting paper that I will ever be on." Adleman could not have been more wrong. The system, dubbed RSA (Rivest, Shamir, Adleman) as opposed to ARS, went on to become the most influential cipher in modern cryptography.

Správné použití kvalitní Å¡ifry je velkou pomocí pro obÄ› komunikující strany, avÅ¡ak nekorektní zacházení se slabou Å¡ifrou m?že vyvolat velmi faleÅ¡ný pocit bezpe?í.

Ã…â"¢íká se, že zkratka NSA ve skute?nosti znamená "Never Say Anything

copies were passed to the cryptanalysts, who sat in little kiosks, ready to tease out the meanings of the messages. As well as supplying the emperors of Austria with invaluable intelligence, the Viennese Black Chamber sold the information it harvested to other powers in Europe. In 1774 an

first ever military cryptographic device, the Spartan scytale, dating back to the fifth century B.C. The scytale is a wooden staff around which a strip of leather or parchment is wound

Zimmermann employed a neat trick that used asymmetric RSA encryption in tandem with old-fashioned symmetric encryption.

The German military were equally unenthusiastic, because they were oblivious to the damage caused by their insecure ciphers during the Great War. For example, they had been led to believe that the Zimmermann telegram had been stolen by American spies in Mexico, and so they blamed that failure on Mexican security. They still did not realize that the telegram had in fact been intercepted and deciphered by the British, and that the Zimmermann debacle was actually a failure of German cryptography.

Jestliže nÄ›kdy platí, že nutnost je matkou invence, pak je rovn?ž možné, že ohrožení je matkou kryptoanalýzy.

Polský úspÄ›ch v prolomení Enigmy byl dán tÃ…â"¢emi faktory: strachem, matematikou a Å¡pionáží.

NaÅ¡tÄ›stí nahoÃ…â"¢e nevÄ›dÄ›li, že Turing je homosexuál, jinak bychom také mohli prohrát válku.

The correct use of a strong cipher is a clear boon to sender and receiver, but the misuse of a weak cipher can generate a very false sense of security.