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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


What Is WPA? Wi-Fi Protected Access Explained Simply
WPA is the security protocol behind your Wi-Fi connection. This beginner's guide explains what WPA means, how it works, and which version is best.
Kalyan Bhattacharjee
Jul 123 min read


Android 16 Fights Stingray Surveillance with New Network Notification Feature
Android 16 is stepping up mobile security with its new “Network Notifications” feature, designed to alert users when their device connects to fake cell towers—also known as Stingrays. This update offers a major privacy boost by detecting unencrypted or suspicious networks, helping users stay one step ahead of surveillance threats.
Kalyan Bhattacharjee
Jul 113 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 to Use Google Authenticator App | Step-by-Step Setup & Tips
Discover how the Google Authenticator app protects your accounts with 2FA. This guide shows you how to set it up, use it daily, and recover access if needed.
Kalyan Bhattacharjee
Jun 103 min read


Google Login Notification Not Showing? Here's How to Fix It (2FA)
If your Google login verification prompt isn’t appearing on your phone, don’t worry - here are the reasons behind this issue and step-by-step solutions to fix it.
Kalyan Bhattacharjee
Jun 94 min read


Best VPN Apps for Android in 2025 (Free & Paid Options)
Struggling to find a reliable VPN for your Android phone in 2025? Here’s your complete guide to the best free and paid VPN apps tested for speed, security, and value.
Kalyan Bhattacharjee
May 303 min read


How to Tell If Your Phone Is Being Tracked (And Stop It)
Is someone secretly tracking your phone? Learn how to spot the signs - like sudden battery drain or weird app activity—and take back control with simple, effective steps to protect your privacy and stop unwanted tracking.
Kalyan Bhattacharjee
May 234 min read


Google Knows Everything About You? Here’s How to Delete Your Data
Every search, map route, or voice command feeds into Google’s massive data vault about you. While it helps tailor your experience, it also poses privacy risks. In this blog, we’ll uncover what Google knows, how to see it, and—most importantly—how to delete it to reclaim your digital freedom.
Kalyan Bhattacharjee
May 223 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 284 min read


Fingerprint Scanner Technology: How It Works Across Devices
Explore how fingerprint scanners work and secure devices like phones, locks, and more with biometric precision.
Kalyan Bhattacharjee
Apr 203 min read


Digital Identity & Blockchain: The Future of Secure Online Authentication
Blockchain secures digital identities by ensuring privacy, decentralization, and tamper-proof authentication in today's digital world.
Kalyan Bhattacharjee
Apr 193 min read


What is Biometric Authentication | How It Works?
Biometric authentication uses unique physical or behavioral traits - like fingerprints, facial recognition, or iris scans—to verify identity.
Kalyan Bhattacharjee
Apr 183 min read


Cybersecurity Threat Detection: Key Elements of Network Security Monitoring
Ensure robust cybersecurity with effective Network Security Monitoring. Learn key factors to detect threats, and prevent breaches.
Kalyan Bhattacharjee
Jan 83 min read


Network Security Key | What It Is and Why It Matters (2025 Guide)
A Network Security Key is more than just a Wi-Fi password. It's your first line of defense against unauthorized access to your private network. In this blog, we explore what a network security key is, the different types (WEP, WPA, WPA2/WPA3), and why understanding it is crucial for protecting your digital footprint. Whether you're a home user or managing a business network, knowing how this key works can help you secure your data and prevent cyber threats.
Kalyan Bhattacharjee
Aug 26, 20245 min read


Double Hashing | A Deep Dive into Collision Resolution
Double hashing is a powerful collision resolution technique used in hash tables to ensure efficient data retrieval and storage. Unlike simple probing methods, double hashing uses a second hash function to calculate a unique step size, minimizing clustering and improving performance. In this blog, we take a deep dive into how double hashing works, why it’s superior to other methods like linear or quadratic probing, and where it fits into modern data structures.
Kalyan Bhattacharjee
Apr 11, 20244 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
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