Tag Archives: Cryptography

Steganography: from its origins to the present

Steganography: from its origins to the present

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 encryption, which allows you to encrypt a message so as to make it incomprehensible if you do not have a key to decipher it, steganography aims to keep the very existence of the message away from prying eyes, by hiding it. The origins Traces of steganography already existed in ancient Greece, when Herodotus narrated two examples in his Stories, but the first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography […]

War and cryptography: the challenge of quantum communication

War and cryptography: the challenge of quantum communication

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 armies in war to seek information about each other, both to learn about enemy strategies before battle, as well as to discover its movements during it. In order to obtain this information, “cryptoanalysis” was born, that is the study of decrypting encrypted messages without knowing their encryption key. It is easy to assume that if an army, through cryptoanalysis, manages to decipher the enemy’s communications, it can gain a fundamental strategic advantage. To be precise, it must be specified that […]

Quantum challenges to cryptography: why the future is already here

Quantum challenges to cryptography: why the future is already here

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. It often feels like we are about to be thrown in a sci-fi movie in which we will live an extremely high-tech life, surrounded by super intelligent machines and ultra-powerful computers. At the same time, it feels like we have been at the edge of this “brave” new world for quite a bit of time, but never really in it; as if it was just a matter of time – even though  we cannot really say how long – before […]

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

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

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 together with two professors of the Polytechnic of Turin, Carlo Sanna and Antonio Jose’ Di Scala, as a part of the amazing job that he is doing within the Company. Following the abstract: Recently, Blanco-Chac´on proved the equivalence between the Ring Learning With Errors and Polynomial Learning With Errors problems for some families of cyclotomic number fields by giving some upper bounds for the condition number Cond(Vn) of the Vandermonde matrix Vn associated to the nth cyclotomic polynomial. We prove […]

Telsy Event: “An overview on cryptanalysis of ARX ciphers”

Telsy Event: “An overview on cryptanalysis of ARX ciphers”

Telsy has organized the following event in collaboration with the University of Turin: “An overview on cryptanalysis of ARX ciphers” The event will take place on 22 on November, at Turin University (Aula 2), in ‘’Via Carlo Alberto 10’’ Following, a short abstract: ‘’ We present some features of block ciphers based on the three operations: addition mod 2n, rotation and XOR (ARX ciphers) and themain cryptanalytic attacks obtained by developing the methods underlying differential cryptanalysis. We focus on the recent tecnique of rotational-XOR differential cryptanalysis giving some ideas of this attack and its application to SPECK 32/64.’’ Have a look here for more info

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