What is the public-key cryptography (asymmetric cryptography)?
Public-key cryptography, also known as asymmetric cryptography, is a fundamental concept in the field of cybersecurity that emerged due to the issue of key distribution in private-key cryptography (symmetric cryptography). While the key distribution is indeed a significant problem in classical symmetric cryptography, public-key cryptography offered a way to resolve this problem, but additionally introduced
What are the roles of a signature and a public key in communication security?
In messaging security, the concepts of signature and public key play pivotal roles in ensuring the integrity, authenticity, and confidentiality of messages exchanged between entities. These cryptographic components are fundamental to secure communication protocols and are widely used in various security mechanisms such as digital signatures, encryption, and key exchange protocols. A signature in message
- Published in Cybersecurity, EITC/IS/ACSS Advanced Computer Systems Security, Messaging, Messaging security
When was the RSA cryptosystem invented and patented?
The RSA cryptosystem, a cornerstone of modern public-key cryptography, was invented in 1977 by Ron Rivest, Adi Shamir, and Leonard Adleman. However, it is important to note that the RSA algorithm itself was not patented in the United States until 2020. The RSA algorithm is based on the mathematical problem of factoring large composite numbers,
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, Introduction to public-key cryptography, The RSA cryptosystem and efficient exponentiation
What is the role of the parameter t in the Extended Euclidean Algorithm (EEA)?
The parameter t of the Extended Euclidean Algorithm (EEA) plays a crucial role in the field of public-key cryptography, specifically in the context of classical cryptography fundamentals. The EEA is a mathematical algorithm used to find the greatest common divisor (GCD) of two integers and to express it as a linear combination of the two
How does WebAuthn use public key cryptography to authenticate users?
WebAuthn, short for Web Authentication, is a web standard that provides a secure and convenient way for users to authenticate themselves to web applications. It uses public key cryptography as a fundamental mechanism to authenticate users. Public key cryptography is a cryptographic system that utilizes a pair of keys, a public key and a private
- Published in Cybersecurity, EITC/IS/WASF Web Applications Security Fundamentals, Authentication, WebAuthn, Examination review
What is the purpose of WebAuthn in web application security?
WebAuthn, short for Web Authentication, is a web standard developed by the World Wide Web Consortium (W3C) and the FIDO Alliance. It is designed to enhance web application security by providing a secure and convenient way to authenticate users without relying on traditional password-based methods. The purpose of WebAuthn is to address the limitations and
How does WebAuthn address the issue of weak and easily compromised passwords?
WebAuthn is a modern web standard that addresses the issue of weak and easily compromised passwords by providing a secure and user-friendly authentication mechanism for web applications. It is designed to enhance the security of online services by eliminating the reliance on traditional password-based authentication methods. WebAuthn achieves this by leveraging public key cryptography and
How does the use of public key cryptography contribute to authentication in TLS?
Public key cryptography plays a crucial role in ensuring authentication in the Transport Layer Security (TLS) protocol. TLS is a widely used cryptographic protocol that provides secure communication over a network, such as the internet. It is essential for protecting sensitive information during transmission, including login credentials, financial transactions, and personal data. Authentication is the
How does public key cryptography enhance user authentication?
Public key cryptography plays a crucial role in enhancing user authentication in the field of cybersecurity. It provides a secure and reliable method for verifying the identity of users and protecting sensitive information. In this explanation, we will explore the fundamental concepts of public key cryptography and how it contributes to user authentication. User authentication
How does the authentication protocol using a Yubikey and public key cryptography verify the authenticity of messages?
The authentication protocol using a Yubikey and public key cryptography is an effective method for verifying the authenticity of messages in computer systems security. This protocol combines the use of a physical hardware device, the Yubikey, with the principles of public key cryptography to ensure secure and reliable authentication of users. To understand how this
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