secure-os wrote
Jul 16, 2026 in security, uefi, boot - Secure Boot is a UEFI feature that only lets cryptographically signed software run at startup, blocking bootkits and rootkits that load before your OS. How it works, how it fits Linux, and its honest limits.
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Jun 30, 2026 in privacy, location-data, fourth-amendment - On June 29, 2026, the US Supreme Court ruled 6–3 in Chatrie v. United States that a geofence warrant is a 'search' under the Fourth Amendment. What the Court held, what it changes, what it doesn't - and the location-privacy habits that still matter.
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Jun 28, 2026 in encryption, data-sanitization, opsec - Why shred and dd do not work on solid-state drives, and the methods that do: ATA Secure Erase, NVMe Format and Sanitize, and crypto-erase by destroying the key.
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Jun 26, 2026 in linux, antivirus, malware - Does Linux need antivirus? The honest answer, when it actually matters (servers, mail gateways, mixed Windows networks), the real tools - ClamAV, rkhunter, chkrootkit - and the layered defenses that protect a desktop better than a virus scanner.
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Jun 23, 2026 in keylogger, malware, passwords - A keylogger records every key you press to steal passwords and private data. What a keylogger is, the software and hardware types, how to detect one, and how to protect yourself.
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Jun 23, 2026 in botnet, malware, ddos - A botnet is a network of devices secretly controlled by an attacker. What a botnet is, how it works, what it is used for (DDoS, spam, fraud), and how to keep your devices out of one.
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Jun 23, 2026 in social-engineering, phishing, security - Social engineering tricks people into giving up access or information instead of breaking the tech. What it is, the main tactics (phishing, pretexting, baiting), real examples, and how to defend against it.
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Jun 22, 2026 in threat-model, opsec, privacy - A threat model is a simple plan that answers four questions: what you protect, who you protect it from, how likely the risk is, and what it costs to defend. Build one in minutes, without paranoia, so your security effort matches your real risks.
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Jun 22, 2026 in linux, sandboxing, security - Linux sandboxing confines an application so that, if it is compromised, the damage stays contained. What sandboxing is, how Flatpak, Firejail, bubblewrap and containers do it, and how it fits a real defense-in-depth setup.
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Jun 22, 2026 in malware, rootkit, security - A rootkit is malware that hides deep in your system to keep control while staying invisible. What a rootkit is, the types, the warning signs, how to detect one, and why a clean reinstall is often the only sure fix.
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Jun 21, 2026 in phishing, ai, security - AI-generated phishing surged roughly 14× in 2026, and the FBI logged more phishing complaints than any other crime category in 2025. Here's how to spot a modern phishing attempt and the practical steps that actually prevent it.
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Jun 20, 2026 in phishing, security, email - A practical, sign-by-sign checklist for spotting a phishing email - spoofed senders, manufactured urgency, deceptive links, attachments, credential requests and tells in the writing - plus exactly what to do when one lands in your inbox.
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Jun 20, 2026 in linux, arch, aur - In June 2026 hundreds of Arch User Repository packages were hijacked to deploy an infostealer and an eBPF rootkit. What actually happened, why the AUR is structurally riskier than Arch's official repos, and a practical routine to vet AUR packages before you install them.
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Jun 19, 2026 in firewall, security, network - A firewall decides which network traffic is allowed in or out of your device or network. What a firewall is, how it works, the main types (hardware, software, stateful), what it can and can't protect against, and how it fits into real security.
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Jun 19, 2026 in phishing, security, email - Phishing tricks you into handing over passwords or money by impersonating someone you trust. What phishing is, the main types (email, spear, smishing, vishing), the red flags, and the defenses that actually work - 2FA and a password manager.
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Jun 19, 2026 in 2fa, authentication, security - Two-factor authentication adds a second proof of identity on top of your password, so a stolen password alone can't open your account. What 2FA is, the methods ranked from SMS to hardware keys, the honest limits, and how to set it up.
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Jun 18, 2026 in opsec, privacy, operational-security - OPSEC (operational security) is the practice of protecting the small pieces of information that, combined, expose you. What OPSEC means, where it came from, the 5-step process, and how to apply it to your everyday digital life - without paranoia.
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Jun 17, 2026 in linux, windows, security - Is Linux more secure than Windows in 2026? Linux has real structural advantages - permissions, smaller desktop attack surface, open-source auditability - but Windows has closed much of the gap. What actually makes the difference, honestly.
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Jun 14, 2026 in encryption, privacy, security - Encryption scrambles data so only someone with the key can read it. What encryption is, symmetric vs asymmetric, at-rest vs in-transit, end-to-end encryption, and the honest limits - explained by threat model.
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Jun 14, 2026 in malware, security, privacy - Malware is any software built to harm or exploit a device - viruses, worms, trojans, ransomware, spyware, keyloggers. What malware is, the main types, how it gets in, and the layered defences that actually work.
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Jun 14, 2026 in ransomware, malware, security - Ransomware is malware that encrypts your files and demands payment for the key. What ransomware is, how an attack unfolds, why paying is a bad bet, and the one defence that actually works: backups it can't reach.
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Jun 14, 2026 in spyware, malware, privacy - Spyware is malware that secretly monitors and collects your data - keystrokes, browsing, location, even your screen. What spyware is, the types, how it gets in, the warning signs, and how to remove and prevent it.
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Jun 12, 2026 in encryption, luks, opsec - A practical guide to full disk encryption across Linux, Windows, macOS and cross-platform tools - what it protects, what it does not, and how to get it right.
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Jun 12, 2026 in qubes, tails, whonix - A decision framework for choosing between Qubes OS, Tails, and Whonix in 2026 - using a threat model matrix that covers targeted malware, physical seizure, mass surveillance, and identity linkage.
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