Cryptography | Applied mathematics
Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized: kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security (data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications. Cryptography prior to the modern age was effectively synonymous with encryption, converting readable information (plaintext) to unintelligible nonsense text (ciphertext), which can only be read by reversing the process (decryption). The sender of an encrypted (coded) message shares the decryption (decoding) technique only with intended recipients to preclude access from adversaries. The cryptography literature often uses the names "Alice" (or "A") for the sender, "Bob" (or "B") for the intended recipient, and "Eve" (or "E") for the eavesdropping adversary. Since the development of rotor cipher machines in World War I and the advent of computers in World War II, cryptography methods have become increasingly complex and their applications more varied. Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in actual practice by any adversary. While it is theoretically possible to break into a well-designed system, it is infeasible in actual practice to do so. Such schemes, if well designed, are therefore termed "computationally secure"; theoretical advances (e.g., improvements in integer factorization algorithms) and faster computing technology require these designs to be continually reevaluated, and if necessary, adapted. Information-theoretically secure schemes that provably cannot be broken even with unlimited computing power, such as the one-time pad, are much more difficult to use in practice than the best theoretically breakable, but computationally secure, schemes. The growth of cryptographic technology has raised a number of legal issues in the Information Age. Cryptography's potential for use as a tool for espionage and sedition has led many governments to classify it as a weapon and to limit or even prohibit its use and export. In some jurisdictions where the use of cryptography is legal, laws permit investigators to compel the disclosure of encryption keys for documents relevant to an investigation. Cryptography also plays a major role in digital rights management and copyright infringement disputes in regard to digital media. (Wikipedia).
An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org
From playlist Cryptography
Steganography Tutorial - Hide Messages In Images
Steganography is the hiding of a secret message within an ordinary message and the extraction of it at its destination. Steganography takes cryptography a step further by hiding an encrypted message so that no one suspects it exists. Ideally, anyone scanning your data will fail to know it
From playlist Ethical Hacking & Penetration Testing - Complete Course
This video gives a general introduction to cryptography WITHOUT actually doing any math. Terms covered include cryptology vs cryptography vs cryptanalysis, symmetric vs public key systems, and "coding theory." NOTE: Yes, I said and wrote "cryptOanalysis" when it's actually "cryptanalysis
From playlist Cryptography and Coding Theory
Cryptanalysis of Classical Ciphers
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist Computer - Cryptography and Network Security
Symmetric Key Cryptography: The Caesar Cipher
This is the first in a series about cryptography; an extremely important aspect of computer science and cyber security. It introduces symmetric key cryptography with a well known substitution cipher, namely the Caesar Cipher. It includes a few examples you can try for yourself using diff
From playlist Cryptography
Introduction - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography
Primality (1 of 2: Fermat's Test)
From playlist Cryptography
Cryptography Course 🔥FREE | Cryptography Lecture | Cryptography Course Online Free | Simplilearn
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From playlist Cyber Security Playlist [2023 Updated]🔥
Symmetric Key Cryptography And Asymmetric Key Cryptography | Cryptography Tutorial | Simplilearn
🔥Advanced Executive Program In Cybersecurity: https://www.simplilearn.com/pgp-advanced-executive-program-in-cyber-security?utm_campaign=SymmetricKeyCryptographyAndAsymmetricKeyCryptography&utm_medium=Descriptionff&utm_source=youtube 🔥Caltech Cybersecurity Bootcamp(US Only): https://www.sim
From playlist Cyber Security Playlist [2023 Updated]🔥
Symmetric Key Cryptography | Stream Cipher & Block Cipher Explained | Network Security | Simplilearn
This video on Symmetric Key Cryptography will acquaint you with the process of symmetric encryption and decryption. Here, we take a small recap into cryptography, the working and applications of symmetric key cryptography, and its advantages. We also have stream cipher and block cipher exp
From playlist Cyber Security Playlist [2023 Updated]🔥
Asymmetric Key Cryptography | RSA Encryption Algorithm | Asymmetric Encryption | Simplilearn
In this video on Asymmetric Key Cryptography, we learn the ins & outs of asymmetric encryption and decryption. From learning the importance of asymmetric encryption to its applications, advantages and workflow, we cover all the bases and also take a look at why it's called public key crypt
From playlist Cyber Security Playlist [2023 Updated]🔥
Few other Cryptanalytic Techniques
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist Computer - Cryptography and Network Security
What is Cryptography? | Introduction to Cryptography | Cryptography for Beginners | Edureka
🔵Edureka Cyber Security Masters Program: https://bit.ly/3pfHHIN 🔥Edureka CompTIA Security+ Certification Training: https://bit.ly/3nxeVRl Cryptography is essential to protect the information shared across the internet. This video on What is cryptography explaines you the fundamental concep
From playlist Cyber Security Training for Beginners | Edureka
What Is Cryptography? | Introduction To Cryptography | Cryptography Tutorial | Simplilearn
🔥Advanced Executive Program In Cybersecurity: https://www.simplilearn.com/pgp-advanced-executive-program-in-cyber-security?utm_campaign=WhatisCryptography&-rjWx39mB4Scutm_medium=Descriptionff&utm_source=youtube 🔥Caltech Cybersecurity Bootcamp(US Only): https://www.simplilearn.com/cybersecu
From playlist Cyber Security Playlist [2023 Updated]🔥
Cryptography is fascinating because of the close ties it forges between theory and practice. It makes use of bitwise computations, advanced algebra, string operations and everything in between. Explaining cryptography requires not only showing the math behind it, but also tying it to real-
From playlist Wolfram Technology Conference 2021
Cryptography is a complex and confusing subject. In this talk you will learn about the core components of cryptography used in software development: securing data with encryption, ensuring data integrity with hashes and digital signatures, and protecting passwords with key derivation funct
From playlist Blockchain
Cryptography is a complex and confusing subject. In this talk you will learn about the core components of cryptography used in software development: securing data with encryption, ensuring data integrity with hashes and digital signatures, and protecting passwords with key derivation funct
From playlist Blockchain
Course Overview - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography