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May 28

Who’s Actually Using Web3 and DeFi in 2026: Beyond the Hype, Real Users and Their Strategies

Headlines were once about explosive growth and retail speculation…

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How can you become a one-man-army OSINT specialist?

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Security Tips & Devices for Digital Nomads

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The Only Safe Way to Store Crypto

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Essential Security Tactics to Implement After the Bybit Hack

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Auditor’s Advice: Solidity Checklist & Reentrancy Attack | Part 2/3

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Vladimir S.

Threat Researcher & Author

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Blog iconOfficer's Blog
May 28
Essential iOS Hardening Steps
Our phones now store everything from our banking details and health records to our private messages and photos, so mobile security is more important than ever.
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Apr 30
OpSec Hub: Fortifying Web3 with Practical OpSec Education
In April 2026, over $630 million was drained in 30+ incidents, with builders, protocols, and users facing sophisticated attacks daily.
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Apr 24
Security Sucks in General Nowadays. Blockchains Just Tend To Have an Immediate Payoff
Every week, there's a new headline about a huge data breach, or an attack that somehow got past "enterprise-grade" defenses.
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Apr 23
Protecting Your Linux System Against DPRK (North Korean) Cyber Attacks
Scammers posing as recruiters entice users with coding exams or job-related tasks that execute malicious code across Windows, macOS and Linux.
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Apr 15
Quantum Internet Launches 2027: How It Ends Privacy Forever (and the 4 Tools to Stay Invisible)
By 2027, quantum networks go live in Japan, China, and Europe. At the same moment, quantum computers hit the tipping point.
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Apr 14
Protecting Crypto Domains and Infra: A Guide to Defending Against DNS Hijacking and BGP Attacks
In the fast-paced world of decentralized finance (DeFi) and Web3, a project’s domain and DNS infrastructure are often its most valuable and weakest points.
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Apr 13
I Reviewed 47 Crypto OpSec Failures — The ONE Mistake 100% of Victims Made
Every single time, the money walked out the front door because a human let it. Everyone blames the code. I blame the human. Here’s proof from 47 cases… I grouped them...
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Apr 13
Safeguard Your Crypto: Essential Tips to Prevent Address Poisoning Attacks
Address poisoning attacks are a common scam in the blockchain ecosystem, where attackers generate wallet addresses that mimic those in a victim's transaction history.
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Dec 22
Essential Security Tactics to Implement After the Bybit Hack
In February 2025, Bybit experienced a hack involving the compromise of their Safe multisig wallet, leading to the theft of approximately $1.4 billion in assets.
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Dec 15
The Worst OpSec Fails of 2025: Lessons from Darknet Busts and Whale Kidnappings
Remember when we were kids, adults warned you not to leave your bike unlocked on the street? Well, fast-forward to 2025, and it’s the same but with all this crypto stuff.
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Dec 13
Staying Private in Crypto: Your Guide to Keeping Things Under the Radar
We’ll focus on Bitcoin and Ethereum, and I’ll keep it straightforward so you can try it without feeling overwhelmed.
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Dec 9
Why You Must Hire Professional Lawyers and Investigators When Your Crypto Is Hacked, Scammed, or Unlawfully Frozen, or Stolen
Whether your wallet was hacked, you fell victim to a sophisticated scam, or a centralized exchange (CEX) unlawfully froze your funds, the emotional and financial impact is immediate and brutal.