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Tech Tutorials | App Reviews & Android Fixes | Fintech Shield Blog
Welcome to the Fintech Shield Blog | Your go-to hub for insightful Tech Tutorials, Unbiased App Reviews, Android Solutions, Windows Solutions and Digital innovation tips. Whether you're a curious user or a seasoned tech pro, we’ve got something valuable for you. Stay ahead in the digital era with our expert-driven guides and updates.
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What Are the Three Goals of Cybersecurity? [CIA Triad Explained]
The three goals of cybersecurity - Confidentiality, Integrity, and Availability form the backbone of digital protection. This blog explains the CIA Triad, why it matters, and how it applies to real-world scenarios in 2025.
Kalyan Bhattacharjee
Sep 223 min read


Secure Internal Communication: Why It’s Critical for Cybersecurity & DevOps
In an age where data breaches and cyber threats are constantly evolving, secure internal communication is no longer optional it’s essential. Whether you're managing a growing app, a cloud-based business, or an enterprise network, protecting the flow of data between services, servers, and internal APIs is critical.
Kalyan Bhattacharjee
Jul 94 min read


Top Cybersecurity Companies in India (2025 List & Services)
Cyberattacks in India are rising — and these cybersecurity companies are stepping up. From antivirus to AI threat detection, here’s who’s leading the charge in 2025.
Kalyan Bhattacharjee
Jul 54 min read


Data Leak: 16 Billion Usernames and Passwords Compromised (2025)
In one of the largest data exposures in history, over 16 billion usernames and passwords have surfaced on the dark web, raising serious concerns about global cybersecurity. Compiled from multiple breaches and info-stealer malware attacks, this massive dataset includes login credentials from platforms like Google, Facebook, Apple, and more. If you've reused passwords or stored them in your browser, your accounts could be at risk.
Kalyan Bhattacharjee
Jun 205 min read


How Does Antivirus Software Work? A Beginner-Friendly Guide
Ever wondered how antivirus software keeps your computer safe? This beginner-friendly guide explains how antivirus detects, blocks, and removes threats in real-time.
Kalyan Bhattacharjee
Apr 283 min read


Network Security - A Deep Dive into Firewall Authentication
Explore the critical role of firewall authentication in network security, and learn how step-by-step implementation safeguards systems, controls access, and protects sensitive data from cyber threats.
Kalyan Bhattacharjee
Mar 22, 20243 min read


CERT-IN: Origin, Purpose, and Role in India's Cybersecurity Landscape
The Indian Computer Emergency Response Team (CERT-IN) plays a pivotal role in safeguarding the nation's digital infrastructure. Established under the Ministry of Electronics and Information Technology, CERT-IN is the nodal agency for responding to cybersecurity threats and incidents in India. This blog explores the origin, purpose, and vital functions of CERT-IN in strengthening India’s cyber defense and promoting secure digital practices nationwide.
Kalyan Bhattacharjee
Feb 13, 20243 min read


What Is a RAT Tool? Risks, Examples, and How to Prevent Attacks
Remote Access Trojans (RATs) are powerful yet dangerous tools that can give cybercriminals full control over your device without your knowledge. In this blog, we break down what RAT tools are, how they work, the risks they pose to your privacy and data, and most importantly - how you can prevent falling victim to them.
Kalyan Bhattacharjee
Sep 6, 20234 min read


MITM Attacks Explained: Securing Your Digital World
Man-in-the-Middle (MITM) attacks are a stealthy but powerful cyber threat where attackers secretly intercept or alter communication between two parties. Whether you're browsing over public Wi-Fi or logging into secure websites, MITM attacks can expose your personal data, login credentials, and sensitive transactions. In this blog, we break down how these attacks work, the signs to watch for, and the essential steps you can take to protect your digital life.
Kalyan Bhattacharjee
Jul 18, 20234 min read


Encryption and Decryption Guide: Safeguarding Your Digital World
In today’s connected world, our personal and professional data travels across countless digital channels. From online banking to private chats, encryption and decryption act as the invisible shields that keep sensitive information safe from prying eyes. This blog explores how these security mechanisms work, why they matter in everyday life, and how you can use them to protect your digital world.
Kalyan Bhattacharjee
Jul 9, 20234 min read


What Is Phishing? Protecting Yourself from Phishing Attacks
Phishing Attacks Introduction In today's interconnected world, where online activities have become an integral part of our daily lives,...
Kalyan Bhattacharjee
Jun 30, 20233 min read


The Dark Side of AI: Inside the World of Deepfakes
Deepfakes are redefining the boundaries of digital media—blurring the line between real and fake with astonishing accuracy. Powered by advanced AI, these manipulated videos and images can imitate real people with unsettling realism, raising concerns about misinformation, privacy, and security. In this blog, we unravel the technology behind deepfakes, explore their implications, and discuss how to spot and safeguard against this rising form of digital deception.
Kalyan Bhattacharjee
Jun 28, 20234 min read


Hashing Functions: MD5 and SHA Algorithms
Explore the basics of hashing functions like MD5 and SHA algorithms, their importance in cybersecurity, and how they work.
Kalyan Bhattacharjee
Jun 26, 20234 min read


Hardware Firewalls: Enterprise-Grade Security for Every Network
In an age of increasing cyber threats, relying solely on software protection isn't enough. Hardware-based firewalls offer a powerful first line of defense by filtering incoming and outgoing traffic at the network's entry point. Unlike traditional software firewalls, these dedicated security devices provide enhanced performance, deeper packet inspection, and are less vulnerable to tampering.
Kalyan Bhattacharjee
Jun 12, 20235 min read


DHCP Server | Simplifying Network Management
A DHCP (Dynamic Host Configuration Protocol) server is a vital component in modern networking, designed to automatically assign IP addresses and network configurations to devices on a network. This simplifies network management, reduces manual errors, and ensures seamless connectivity. In this blog, we explore how DHCP works, why it’s essential, and how it streamlines both small-scale and enterprise-level network setups.
Kalyan Bhattacharjee
Jun 11, 20233 min read


VPN Revolution: An Essential Tool in Today's Digital Age
In an era where digital footprints are constantly tracked and online privacy is under threat, Virtual Private Networks (VPNs) have emerged as essential tools for safeguarding our internet activities. This blog dives deep into the VPN revolution—how these powerful tools work, why they matter now more than ever, and the diverse ways they empower users to browse securely, access restricted content, and protect their data from prying eyes.
Kalyan Bhattacharjee
Jun 1, 20233 min read


Firewalls Explained | The First Line Of Strong Cyber Defense
Firewalls serve as the digital gatekeepers of your network, monitoring and controlling incoming and outgoing traffic based on pre-defined security rules. Whether hardware- or software-based, they create a protective barrier between trusted internal networks and untrusted external sources like the internet. This blog breaks down how firewalls work, their different types, and why they remain the first line of defense against modern cyber threats in 2025.
Kalyan Bhattacharjee
May 27, 20233 min read


AES 256 Bit Encryption | Safeguarding the Digital Realm
Discover how AES 256-bit encryption works and why it's the gold standard for protecting sensitive data in today’s digital world.
Kalyan Bhattacharjee
May 21, 20234 min read


Data Execution Prevention (DEP): Enhancing Cybersecurity
Data Execution Prevention (DEP) is a critical security feature that helps protect your system from malicious attacks by preventing unauthorized code from running in memory. In this blog, we explore how DEP works, why it’s important for cybersecurity, and how users can ensure it's enabled to strengthen their device's defense against threats.
Kalyan Bhattacharjee
May 16, 20233 min read


Kali Linux: The Operating System for Cyber-Security Professionals
Kali Linux is a powerful, Debian-based operating system tailored for cybersecurity professionals and ethical hackers. Packed with hundreds of pre-installed tools for penetration testing, digital forensics, and network analysis, Kali is the go-to OS for security auditing. In this blog, we explore what makes Kali Linux unique, its key features, and why it's essential for anyone serious about cybersecurity.
Kalyan Bhattacharjee
May 15, 20233 min read
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