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Safe & Security Articles
Page 2 of 88
Birthday attack in Cryptography
A birthday attack is a cryptographic attack that exploits the birthday paradox to find collisions in hash functions. It leverages statistical probability to discover two different inputs that produce the same hash output, potentially compromising the security of cryptographic systems. The attack is named after the birthday paradox, which states that in a group of just 23 people, there's a 50% probability that two people share the same birthday. This counterintuitive result demonstrates how collision probabilities increase rapidly with group size. How Birthday Attacks Work A hash function takes an input message and produces a fixed-size output ...
Read MoreInternet Security Association and Key Management Protocol (ISAKMP)
The Internet Security Association and Key Management Protocol (ISAKMP) is a framework for establishing security associations (SAs) and performing key exchange in a secure manner. Security associations are agreements between two devices that define how they will communicate securely, while key exchange refers to the process of sharing cryptographic material needed to secure communication. ISAKMP defines the structure and format of messages used to establish and maintain SAs but does not specify the actual cryptographic algorithms or keys. Instead, it provides a framework for negotiating these details and establishing a secure channel between devices. ...
Read MoreHashed Message Authentication Code (HMAC)
HMAC (Hashed Message Authentication Code) is a cryptographic mechanism that combines a secret key with a hash function to provide both message authentication and integrity verification. Unlike simple hashing, HMAC ensures that only parties possessing the shared secret key can generate or verify the authentication code. HMAC is widely used in secure communication protocols including TLS/SSL, IPsec, and JWT tokens. It provides a reliable method to detect message tampering and verify the sender's identity in distributed systems and API authentication. How HMAC Works HMAC follows a specific construction that makes it resistant to various cryptographic attacks: ...
Read MoreTypes of Authentication Protocols
Authentication protocols are methods or procedures used to verify the identity of a user, device, or system. These protocols are designed to ensure that only authorized users or devices can access protected resources, preventing unauthorized access or tampering. Authentication Process Flow User Requests Access Auth Server Verifies Identity Resource Grants Access ...
Read MoreThe Reflection Attack
A reflection attack is a type of Distributed Denial of Service (DDoS) attack where an attacker sends requests to legitimate servers using the victim's spoofed IP address. The servers unknowingly respond to these requests, directing their responses to the victim instead of the attacker. This creates a flood of unwanted traffic that can overwhelm the victim's network connection. Reflection attacks are particularly effective because they use legitimate infrastructure to carry out the attack, making them difficult to detect and block. The attacker remains hidden while legitimate servers become unwitting participants in the assault. Reflection ...
Read MoreDifference between IPSec and SSL
IPSec (Internet Protocol Security) is a suite of protocols that provides security services during communications between networks. It supports network-level peer authentication, data origin authentication, data integrity, data encryption and replay protection. It is often used to create secure VPNs at the network layer. SSL (Secure Sockets Layer) is a networking protocol that provides a secure connection between a client and a server over the internet. It works at the transport layer and is commonly used to secure communication between web browsers and web servers through HTTPS. IPSec vs SSL — Network Layer Protection ...
Read MoreCyber Attack Symptoms
A cyber attack can compromise your computer's security even when advanced antivirus software is installed. While regular system scans provide protection, attackers use sophisticated techniques that may bypass detection. Recognizing the warning signs of an active attack is crucial for immediate response and damage control. Understanding these symptoms helps identify potential breaches before significant damage occurs, allowing for prompt remediation actions. Common Cyber Attack Symptoms Process and Network Anomalies Unauthorized PowerShell activity − Unusual PowerShell processes running in Task Manager without user initiation indicate potential remote access or malware execution. Suspicious network ...
Read MoreRundll32.exe Attack
A Rundll32.exe attack exploits the legitimate Windows utility rundll32.exe to execute malicious Dynamic Link Libraries (DLLs). Rundll32.exe is a Windows system process that allows programs to invoke functions from DLL files, making it an attractive target for attackers who can abuse this functionality to run malicious code while appearing as legitimate system activity. Attackers leverage rundll32.exe because it can load and execute code from DLL files, and security tools often trust this legitimate Windows process. This technique is commonly used in penetration testing and malware campaigns to bypass security controls and establish remote access to target systems. How ...
Read MoreWhat is a CDN? (Functions, How does it work, Advantages)
A Content Delivery Network (CDN) is a geographically distributed network of servers that work together to provide fast delivery of Internet content. CDNs cache web content at multiple locations worldwide, bringing data closer to end users to reduce latency and improve performance. CDNs serve various types of content including web pages, images, videos, applications, and downloadable files. Major companies like Netflix, Amazon, and Facebook rely on CDNs to deliver content to millions of users efficiently across the globe. CDN Architecture Origin Server ...
Read MoreCATA protocol in Computer Network
Computer networks require efficient protocols to manage address assignments and prevent conflicts as they grow in complexity. The Common Address Table Algorithm (CATA) protocol is designed to centralize IP address management and provide redundancy mechanisms for network stability. CATA builds upon existing address resolution protocols to create a distributed yet coordinated approach to IP address assignment, reducing conflicts and improving network reliability through its redundancy features. How CATA Protocol Works The CATA protocol operates through a distributed address table system where multiple nodes maintain synchronized copies of address assignments. When a device requests an IP address, the ...
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