{"id":5309,"date":"2021-12-10T07:13:41","date_gmt":"2021-12-10T07:13:41","guid":{"rendered":"https:\/\/www.danielparente.net\/en\/2021\/12\/10\/full-course-cryptography-from-standford\/"},"modified":"2021-12-10T10:29:23","modified_gmt":"2021-12-10T10:29:23","slug":"cryptography-full-course-from-standford","status":"publish","type":"post","link":"https:\/\/www.danielparente.net\/en\/2021\/12\/10\/cryptography-full-course-from-standford\/","title":{"rendered":"Cryptography Full Course from Standford 2022"},"content":{"rendered":"\r\n

Interesting cryptography course from Stanford University with a very good blend of theoric and practical aspects of cryptography.<\/p>\r\n\r\n\r\n\r\n

About this Cryptography Full Course<\/h2>\r\n

Cryptography is an important tool for protecting information in computer systems.<\/p>\r\n

In this course, you will learn about the inner workings of cryptographic systems and how to properly use them in real-world applications.<\/p>\r\n

The course begins with a detailed discussion of how two parties sharing a secret key can communicate securely when a powerful adversary can intercept or manipulate traffic.<\/p>\r\n

We will examine a number of deployed protocols and analyze the fallibility of existing systems.<\/p>\r\n

Later in the course, we will discuss public-key technology, in which two parties generate a shared secret key. During the course, students will be exposed to many exciting unsolved problems in this area and will work on fun (optional) programming projects. The second course (Crypto II) focuses on more advanced cryptographic techniques such as zero-knowledge, privacy mechanisms, and other forms of encryption.<\/p>\r\n

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What is Cryptography<\/h2>\r\n

Cryptography is the study of secure communication techniques that allow only the sender and receiver of a message to see its contents. The word is derived from the Greek word kryptos, which means “hidden.” It is closely related to encryption, in which ordinary text is scrambled into what is known as ciphertext and then reversed. Cryptography is also used to disguise information in images using microdots or composites. Ancient Egyptians are known to have used such techniques in complex hieroglyphics, and the Roman emperor Julius Caesar is said to have used one of the first modern ciphers.<\/p>\r\n

When transmitting electronic data, the most common cryptographic techniques are used to encrypt and decrypt e-mail and other plaintext messages. The simplest method is to use a symmetric “secret key”. In this case, the data is encrypted with the private key, and both the encrypted message and the private key are sent to the recipient for decryption. The problem? If a message is intercepted, the third party has everything it needs to decrypt and read the message. To solve this problem, cryptographers have developed an asymmetric system called the public-key system. In this system, each user has two keys, a public key and a private key. The sender requests the recipient’s public key, encrypts the message, and sends it. When the message arrives, only the recipient’s private key can decrypt it. In other words, without the corresponding private key, theft is pointless.<\/p>\r\n

Cryptography Best practices<\/h3>\r\n


Users should always encrypt the messages they send, preferably with a public key. It’s also advisable to encrypt important and sensitive files, from family photos to corporate data such as personnel files and accounting data. Choose a security solution with strong encryption algorithms and a user-friendly interface. This way, you can use the encryption feature regularly and prevent data loss if your mobile device, hard drive, or storage device falls into the wrong hands.<\/p>\r\n

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Why is cryptography so important?<\/h2>\r\n


Cryptography needs everywhere<\/h3>\r\n

Today, cryptography is an integrated layer of defense in all digital transformation initiatives grouped under the term “digital business.”<\/a> As the foundation of modern security systems, cryptography is used to secure transactions and communications, protect personal data and other sensitive information, authenticate identity, prevent document tampering, and build trust between servers. Cryptography is one of the most important tools for protecting the systems that contain an organization’s most important asset – its data – whether that data is at rest or in motion.<\/p>\r\n

The data is important information such as personal data of customers and employees, intellectual property, business plans and other sensitive information. Therefore, cryptography is an important infrastructure. This is because the security of sensitive data increasingly depends on cryptographic solutions.<\/p>\r\n

Weak or hidden ciphers make critical infrastructure vulnerable to attack. Publicly accessible data in the public domain can lead to brand damage. In this modern environment, you need to pay attention to how cryptography is implemented and managed in your organization.<\/p>\r\n

When wrapped in an invisible layer of encryption, sensitive data becomes unreadable and immutable, preventing malicious actors from doing harm. The core elements that make a cryptographic layer secure are algorithms, keys, libraries and certificates, which we will discuss here.<\/p>\r\n