cryptography Archivi - Page 2 of 2

The Caesar cipher

In cryptography, the Caesar cipher is one of the oldest cryptographic algorithms of which there is a historical trace. It is a mono-alphabetic substitution cipher, in which each letter of...

History of cryptography: the scitala

29 Nov

The scitala or scital (in ancient Greek: σκυτάλη, skytàlē, “stick”) is traditionally considered an encrypted and secret message that was sent by the ephors, the five supreme magistrates of Sparta,...

RSA Cryptography: history and uses

26 May

The RSA encryption is a public-key-based cryptosystem, named after Ron Rivest, Adi Shamir and Len Adleman who invented it in 1977. Clifford Cock had previously invented an equivalent system for...

AES-256 encryption: how does it protect our most sensitive data?

28 Apr

You have certainly heard of AES-256. Commonly referred to as “military-graded” cipher, the Advanced Encryption Standard (AES) is essential in government cybersecurity, encryption, and electronic data protection. Its story started...

Agnes Meyer Driscoll: women in cryptanalysis

01 Mar

Agnes Meyer Driscoll was a leading cryptanalyst working for American defense agencies between WW1 and the Cold War’s early years. She started her career in the US Navy by enlisting...

Enigma: a story about cipher mishandling

24 Feb

Enigma was a portable cipher machine producing a polyalphabetic substitution cipher. It had up to 5 rotor scramblers. Many versions included many sets of plugboard connections, which allowed a further swap of a...

Steganography: from its origins to the present

25 Jun

The term steganography refers to a technique that aims to hide communication between two interlocutors. The term is composed precisely of the Greek words στεγανός (covered) and γραφία (writing). Unlike...

War and cryptography: the challenge of quantum communication

16 Jun

Message encryption has always been a very important tool within the military, stretching back to the time of the ancient Greeks to the present day. It is natural for two...

Quantum challenges to cryptography: why the future is already here

24 Mar

More and more often, we hear rather dramatic and movie-like statements about how the quantum era will change many aspects of our life, among which also cryptography and, therefore, security....

ON THE CONDITION NUMBER OF THE VANDERMONDE MATRIX OF THE nTH CYCLOTOMIC POLYNOMIAL

25 Feb

Edoardo Signorini is an undergraduate student who is currently working on various projects in Telsy, while writing his thesis about the “Post Quantum Cryptography”. Furthermore, he also published his work...