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Introduction to Cryptography →0/22
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Introduction to Cryptography

1:17:24
2

Modular Arithmetic and Historical Ciphers

1:31:10
3

Stream Ciphers, Random Numbers and the One Time Pad

1:29:38
4

Stream Ciphers and Linear Feedback Shift Registers

1:29:39
5

Data Encryption Standard (DES): Encryption

1:33:36
6

Data Encryption Standard (DES): Key Schedule and Decryption

1:07:06
7

Introduction to Galois Fields for the AES

1:30:50
8

Advanced Encryption Standard (AES)

1:33:19
9

Modes of Operation for Block Ciphers

1:25:14
10

Multiple Encryption and Brute-Force Attacks

1:27:49
11

Number Theory for PKC: Euclidean Algorithm, Euler's Phi Function & Euler's Theorem

1:31:02
12

The RSA Cryptosystem and Efficient Exponentiation

1:28:27
13

Diffie-Hellman Key Exchange and the Discrete Log Problem

1:20:47
14

The Generalized Discrete Log Problem and the Security of Diffie-Hellman

1:28:40
15

Elgamal Encryption Scheme

1:17:51
16

Introduction to Elliptic Curves

1:20:42
17

Elliptic Curve Cryptography (ECC)

1:26:31
18

Digital Signatures and Security Services

1:17:15
19

Elgamal Digital Signature

1:22:23
20

Hash Functions

1:05:04
21

SHA-1 Hash Function

1:18:35
22

SHA-3 Hash Function

1:38:17

Data Encryption Standard (DES): Encryption

Christof PaarRuhr University Bochum

Founding Director, Max Planck Institute for Security and Privacy

1:33:36·2014·undergraduate level

This lecture provides a rigorous analysis of the Data Encryption Standard (DES), detailing its Feistel network structure, key schedule, and S-box operations. It examines the cryptographic principles underlying this historical symmetric-key block cipher.

Theory & AlgosBio & NeuroCryptographyNeuroscience & CognitionBlock CiphersData Encryption Standard

Interested in studying cybersecurity at the highest level? Bochum offers one of the most advanced academic environments for cybersecurity in Europe. The Max Planck Institute for Security and Privacy (MPI-SP) collaborates closely with the Horst Görtz Institute (HGI) at Ruhr University Bochum (RUB), where leading experts from across the field contribute through excellent teaching and pioneering research. Find out more at https://informatik.rub.de/en/studies/its/.

We are also continuously seeking outstanding young researchers interested in joining our growing teams at both the MPI-SP and RUB.

Previous · Lecture 4

Stream Ciphers and Linear Feedback Shift Registers

Next · Lecture 6

Data Encryption Standard (DES): Key Schedule and Decryption

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