This is a first course of Cryptography. It is about the state-of-the-art of the principal cryptographic algorithms currently used for computer system security purposes.

Students are expected to learn: Cryptographic programming. Symmetric cryptography primitives as: Block Ciphers, Stream Ciphers and Hash Functions. Asymmetric cryptosystems as: Key Exchange, Public Key Cryptography Protocols as: DSA, SRP and SAE.

Basics of programming in C. Basics of computer security. Basics of linear algebra as in courses of "Linear Algebra and Geometry" of the first year.

Cryptographic programming: use of cryptographic primitives in C. use of cryptographic primitives in python. Symmetric Cryptography: Block-Ciphers: DES, AES. Operations Modes: ECB,CBC,CTR,OFB,CFB,GCM,CCM. Stream-Ciphers and PRNG: ARX algorithms: RC4, Salsa e Chacha20. Permutation algorithm: Sponge PRNG Hash Functions: ARX : SHA1, SHA2 Permutation: SHA3 Asymmetric Cryptography: DH Key Exchange on finite fields. DH on elliptic curves. RSA. Protocols: DSA,SAE and SRP.

40 hs of Lectures. 20 hs of Exercises.

Serious Cryptography: A Practical Introduction to Modern Encryption Jean-Philippe Aumasson, No Starch Press, 2018. Understanding Cryptography, A Textbook for Students and Practitioners Paar, Christof, Pelzl, Jan, Springer-Verlag, 2010. Applied Cryptography: Protocols, Algorithms and Source Code in C Bruce Schneier, Wiley; 20th Anniversary edition,2015.

Modalitą di esame: Prova scritta (in aula); Prova orale facoltativa;

Exam: Written test; Optional oral exam;

... Written test; optional request of oral test; The final exam is written. An oral test is optional at the request of the student or at the discretion of the teacher. The written test is considered passed if its result is greater than or equal to 18/30. Only students who have passed the written test can opt to take the oral exam. If requested, the oral exam contributes to determine the final grade together with the written one. Attending the oral exam can lead to both the raising or the lowering of the grade obtained in the written exam.

Gli studenti e le studentesse con disabilitą o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unitą Special Needs, al fine di permettere al/la docente la declinazione pił idonea in riferimento alla specifica tipologia di esame.