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Articles on Trending Technologies
Technical articles with clear explanations and examples
Hashed 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 MoreApproaches to Intrusion Detection and Prevention
Intrusion Detection and Prevention Systems (IDPS) are critical components of cybersecurity infrastructure that monitor network traffic and system activities to identify and block potential security threats. These systems employ various detection methodologies, each with distinct advantages and limitations. Modern organizations face increasingly sophisticated cyber threats, making it essential to understand different detection approaches and implement layered security strategies that combine multiple techniques for comprehensive protection. Signature-Based Detection Signature-based detection relies on a database of known attack patterns or signatures to identify malicious activities. The system compares incoming network traffic and system events against predefined patterns, triggering alerts ...
Read MoreSchiper Eggli Sandoz Protocol
The Schiper Eggli Sandoz (SES) protocol is a distributed routing protocol designed to find optimal paths for data packets traversing a network. Unlike centralized routing approaches, SES distributes routing information across all routers in the network, creating a democratic system that enhances fault tolerance and network resilience. The protocol employs the Bellman-Ford algorithm to calculate shortest distances to destinations and implements split horizon techniques to prevent routing loops. Split horizon prevents routers from advertising routes back to the source from which they learned them, ensuring loop-free topology maintenance. SES Protocol: Distributed Routing Architecture ...
Read MoreWhat is Generic Routing Encapsulation (GRE)?
Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco Systems that enables encapsulation of a wide variety of network layer protocols inside virtual point-to-point links over an Internet Protocol network. GRE uses IP protocol number 47 and is defined by RFC 2784. GRE creates secure tunnels between network endpoints, allowing different private networks to communicate over public infrastructure like the Internet. It operates as a stateless protocol, meaning it doesn't maintain connection state information. How GRE Works GRE works by encapsulating the original packet (payload) within a new IP packet. The process involves: ...
Read MoreForward Error Correction in Computer Networks
Forward Error Correction (FEC) is an error control technique in data transmission where the source (transmitter) adds redundant data, allowing the destination (receiver) to detect and correct errors without requesting retransmission. Unlike Automatic Repeat Request (ARQ), FEC does not require handshaking between sender and receiver, making it suitable for broadcast and real-time applications. In its simplest form, FEC transmits each character twice. The receiver compares both instances and accepts the character if both conform to the protocol, or selects the conforming instance if only one is valid. If neither instance is valid, the character is rejected and replaced with ...
Read MoreWhat is Media Gateway Control Protocol (MGCP)?
Media Gateway Control Protocol (MGCP) is a master/slave protocol used in Voice over IP (VoIP) systems to control media gateways. MGCP enables call agents to manage, create, modify, and delete connections on media gateways, which serve as endpoints for multimedia sessions. In MGCP architecture, the call control intelligence resides outside the gateways in external call control elements called Call Agents. This separation allows centralized control while the gateways handle media processing functions. How MGCP Works MGCP operates on a decomposed gateway model where call control and media processing are separated. The Call Agent sends commands to media ...
Read MoreDifference between Intranet and VPN
An intranet is a private network used within an organization that mimics the functionality of the Internet but remains isolated from external access. A VPN (Virtual Private Network) is a technology that creates secure, encrypted connections over public networks, allowing users to access resources remotely as if they were connected locally. Both technologies serve different purposes in modern business networking. While intranets facilitate internal communication and collaboration within organizations, VPNs enable secure remote access and protect data transmission over untrusted networks. What is an Intranet? An intranet is a private computer network accessible only to authorized users ...
Read MoreDifference between HCL connections and iCloud
HCL Connections and iCloud are two distinct cloud platforms serving different purposes and target audiences. While HCL Connections focuses on enterprise collaboration and team productivity, iCloud serves as Apple's integrated cloud ecosystem for personal and business use across Apple devices. HCL Connections HCL Connections was originally developed by IBM as "IBM Connections" and later acquired by HCL Technologies in 2019. It is an enterprise-focused social collaboration platform designed to enhance team productivity and communication. Key Features Enterprise collaboration tools − Includes wikis, blogs, forums, file sharing, and social networking features for business teams ...
Read MoreWhat is the difference between VPS and VDS?
Let us begin by understanding what VPS is and how it differs from VDS. VPS (Virtual Private Server) VPS stands for Virtual Private Server. It is a virtualized server environment created by partitioning a single physical server into multiple isolated virtual instances. Each VPS operates as an independent server with its own dedicated resources, operating system, and administrative access. A VPS provides users with root access and the ability to install custom software, configure server settings, and manage applications independently. This virtualization technology allows multiple VPS instances to run simultaneously on one physical machine while maintaining complete ...
Read MoreThe Symmetric Cipher Model
The Symmetric Cipher Model is a fundamental cryptographic approach where both sender and receiver use the same secret key for encryption and decryption. This model forms the backbone of modern secure communication, providing fast and efficient protection for sensitive data. In symmetric cryptography, the same key that encrypts plaintext into ciphertext is used to decrypt the ciphertext back to plaintext. This shared secret must remain confidential between communicating parties to maintain security. How the Symmetric Cipher Model Works The symmetric cipher process involves five essential components working together to secure data transmission: ...
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