Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Course

COM-401: Cryptography and security

Lectures in this course (57)

Trust Establishment: Cryptography and Security

Explores trust establishment in cryptography and security, covering secure channels, PKI vulnerabilities, and diverse cryptographic models.

Cryptography and Information Theory

Explores cryptography, perfect secrecy, group theory, and modern cryptographic milestones, emphasizing the trade-off between security and cost.

Algorithms for Big Numbers: Z_n and Orders

Covers algorithms for big numbers, Z_n, and orders in a group, explaining arithmetic operations and cryptographic concepts.

Diffie-Hellman Cryptography: Key Exchange and Fields

Explores Diffie-Hellman key exchange, group orders, Z_p field, and cryptographic challenges.

Diffie-Hellman Cryptography: Key Exchange & ElGamal

Covers Diffie-Hellman key exchange, DDH problem, ElGamal cryptosystem, and security implications.

Diffie-Hellman Cryptography: Key Exchange and ElGamal Encryption

Covers the Diffie-Hellman key exchange protocol and the ElGamal public-key cryptosystem.

RSA Cryptography: Primality Testing and Quadratic Residues

Explores RSA cryptography, covering primality testing, quadratic residues, and cryptographic applications.

RSA Cryptography: Computational Problems

Explores RSA cryptography computational problems, finite fields construction, and computational challenges in RSA cryptography.

Mobile Telephony Security

Explores 2G mobile telephony security, covering authentication, encryption, privacy concerns, and vulnerabilities in encryption algorithms.

Symmetric Encryption Schemes

Explores symmetric encryption schemes, including block and stream ciphers, their vulnerabilities, and the importance of key lengths.

Prime Numbers and Primality Testing

Covers prime numbers, RSA cryptography, and primality testing, including the Chinese Remainder Theorem and the Miller-Rabin test.

Legendre and Jacobi Symbols: RSA Cryptography

Explores Legendre and Jacobi symbols, quadratic residuosity, element orders, and RSA Cryptography complexities.

Bluetooth Security Protocols

Explores Bluetooth security protocols, focusing on secure pairing and preventing active attacks.

Cryptography Fundamentals

Covers the basics of cryptography, including key concepts, tools, and protocols used for secure communication and data protection.

Security Protocols in Practice

Explores the practical implementation of security protocols using the biometric passport as a case study, covering vulnerabilities, TLS evolution, and ChaChaPoly encryption.

Cryptography: Ancient Techniques to Modern Systems

Explores ancient cryptography techniques, the Enigma machine, Kirchhoff's principle, scalability in cryptography, Moore's Law, and a thought experiment on breaking a 128-bit key.

Symmetric Encryption: Formalism and Security

Explores the formalism and security aspects of symmetric encryption systems, including block ciphers, variable length encryption, and security definitions.

Commitment Scheme: Key Derivation and Hash Function

Explains the commitment scheme, key derivation, and hash function for data security.

Cryptographic Hash Functions

Explores cryptographic hash functions, message authentication codes, and MAC constructions, highlighting SHA1, SHA2, SHA3, HMAC, CBC-MAC, WC-MAC, and P-MAC.

Elliptic Curve Cryptography: Galois Fields

Explores Galois fields, elliptic curve cryptography, arithmetic operations, group structure, and practical examples in cryptography.