Informações sobre o curso

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Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key. Throughout the course participants will be exposed to many exciting open problems in the field and work on fun (optional) programming projects. In a second course (Crypto II) we will cover more advanced cryptographic tasks such as zero-knowledge, privacy mechanisms, and other forms of encryption.

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Aprox. 23 horas para completar

Inglês

Habilidades que você terá

Cryptography
Cryptographic Attacks
Public-Key Cryptography
Symmetric-Key Algorithm

Prazos flexíveis

Redefinir os prazos de acordo com sua programação.

Certificados compartilháveis

Tenha o certificado após a conclusão

100% on-line

Comece imediatamente e aprenda em seu próprio cronograma.

Aprox. 23 horas para completar

Inglês

Instrutores

Classificação do instrutor

4,77/5 (464 classificações)

Dan Boneh

Professor

Computer Science

424.633 aprendizes

2 Cursos

Programa - O que você aprenderá com este curso

Classificação do conteúdo96%(20,437 classificações)

Semana

1

Semana 1

5 horas para concluir

Course overview and stream ciphers

5 horas para concluir

12 vídeos (Total 210 mín.), 2 leituras, 2 testes

12 videos

Course Overview10min

What is Cryptography?15min

History of Cryptography18min

Discrete Probability (Crash Course)18min

Discrete Probability (Crash Course, Cont.)13min

Information Theoretic Security and The One Time Pad18min

Stream Ciphers and Pseudo Random Generators19min

Attacks on Stream Ciphers and The One Time Pad23min

Real-World Stream Ciphers19min

PRG Security Definitions24min

Semantic Security15min

Stream Ciphers are Semantically Secure [optional]10min

2 leituras

Lecture slides for all six weeks10min

Course overview and additional reading resources10min

2 exercícios práticos

Week 1 - Problem Set30min

Week 1 - Programming Assignment [optional]30min

Semana

2

Semana 2

4 horas para concluir

Block Ciphers

Week 2. We introduce a new primitive called a block cipher that will let us build more powerful forms of encryption. We will look at a few classic block-cipher constructions (AES and 3DES) and see how to use them for encryption. Block ciphers are the work horse of cryptography and have many applications. Next week we will see how to use block ciphers to provide data integrity. The optional programming assignment this week asks students to build an encryption/decryption system using AES.

4 horas para concluir

11 vídeos (Total 167 mín.)

11 videos

What are Block Ciphers?16min

The Data Encryption Standard21min

Exhaustive Search Attacks19min

More Attacks on Block Ciphers 16min

The AES Block Cipher13min

Block Ciphers From PRGs11min

Review: PRPs and PRFs11min

Modes of Operation: One Time Key7min

Security for Many-Time Key (CPA security)22min

Modes of Operation: Many Time Key (CBC)16min

Modes of Operation: Many Time Key (CTR) 9min

2 exercícios práticos

Week 2 - Problem Set30min

Week 2 - Programming Assignment [Optional]30min

Semana

3

Semana 3

3 horas para concluir

Message Integrity

Week 3. This week's topic is data integrity. We will discuss a number of classic constructions for MAC systems that are used to ensure data integrity. For now we only discuss how to prevent modification of non-secret data. Next week we will come back to encryption and show how to provide both confidentiality and integrity. This week's programming project shows how to authenticate large video files. Even if you don't do the project, please read the project description --- it teaches an important concept called a hash chain.

3 horas para concluir

11 vídeos (Total 130 mín.)

Semana

4

Semana 4

4 horas para concluir

Authenticated Encryption

Week 4. This week's topic is authenticated encryption: encryption methods that ensure both confidentiality and integrity. We will also discuss a few odds and ends such as how to search on encrypted data. This is our last week studying symmetric encryption. Next week we start with key management and public-key cryptography. As usual there is also an extra credit programming project. This week's project involves a bit of networking to experiment with a chosen ciphertext attack on a toy web site.

4 horas para concluir

12 vídeos (Total 167 mín.)

12 videos

Active Attacks on CPA-Secure Encryption12min

Definitions 5min

Chosen Ciphertext Attacks12min

Constructions From Ciphers and MACs20min

Case Study: TLS 1.217min

CBC Padding Attacks14min

Attacking Non-Atomic Decryption 9min

Key Derivation13min

Deterministic Encryption14min

Deterministic Encryption: SIV and Wide PRP20min

Tweakable Encryption14min

Format Preserving Encryption12min

2 exercícios práticos

Week 4 - Problem Set30min

Week 4 - Programming Project [Optional]30min

Semana

5

Semana 5

3 horas para concluir

Basic Key Exchange

Week 5. This week's topic is basic key exchange: how to setup a secret key between two parties. For now we only consider protocols secure against eavesdropping. This question motivates the main concepts of public key cryptography, but before we build public-key systems we need to take a brief detour and cover a few basic concepts from computational number theory. We will start with algorithms dating back to antiquity (Euclid) and work our way up to Fermat, Euler, and Legendre. We will also mention in passing a few useful concepts from 20th century math. Next week we will put our hard work from this week to good use and construct several public key encryption systems.

3 horas para concluir

9 vídeos (Total 133 mín.), 1 leitura, 2 testes

Semana

6

Semana 6

4 horas para concluir

Public-Key Encryption

Week 6. This week's topic is public key encryption: how to encrypt using a public key and decrypt using a secret key. Public key encryption is used for key management in encrypted file systems, in encrypted messaging systems, and for many other tasks. The videos cover two families of public key encryption systems: one based on trapdoor functions (RSA in particular) and the other based on the Diffie-Hellman protocol. We construct systems that are secure against tampering, also known as chosen ciphertext security (CCA security). There has been a ton of research on CCA security over the past decade and given the allotted time we can only summarize the main results from the last few years. The lectures contain suggestions for further readings for those interested in learning more about CCA secure public-key systems. The problem set this week involves a bit more math than usual, but should expand your understanding of public-key encryption. Please don't be shy about posting questions in the forum. This is the last week of this Crypto I course. I hope everyone learned a lot and enjoyed the material. Crypto is a beautiful topic with lots of open problems and room for further research. I look forward to seeing you in Crypto II where we will cover additional core topics and a few more advanced topics.

4 horas para concluir

11 vídeos (Total 155 mín.)

Semana

7

Semana 7

1 hora para concluir

Final exam

1 hora para concluir

Avaliações

4.8

853 avaliações

5 stars
84,94%
4 stars
12,15%
3 stars
1,60%
2 stars
0,56%
1 star
0,71%

Principais avaliações do CRIPTOGRAFIA I

por MD7 de jan de 2017

The course gives fundamentals of Cryptography. But I would say that it dig very deep with fundamentals so I would highly recommend this course if you need/want to understand Cryptoraphy

por FP14 de jul de 2017

Really interesting, provides the basic grounds for understanding a lot of discussions out there. Wikipedia can be useful as a reference, but here I was able to learn about semantic security etc.

por YK31 de jul de 2016

I am very happy and satisfied pursuing this course. I love it. Cryptography is one of the very important concepts in Computer Science and just loved to have the course from Stanford University.

por GK6 de ago de 2016

Great into to the disciple for those of use who are interested in it but don't have access to a formal crypto class for what ever reason. This class made me fall in love with Coursera.

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Criptografia I

Criptografia I

Informações sobre o curso

Habilidades que você terá