David Dobrovitsky’s Post

🚨 “Private” On The Blockchain Isn’t Really Private A common misconception among new Solidity developers is that using the private keyword hides your data or logic from the public. But in reality — everything on the blockchain is visible to everyone. 🧠 Even if you mark variables or functions as private, they’re only logically private within the contract, not physically hidden. Why? Because smart contracts store everything transparently on-chain, and blockchain explorers can read raw storage slots directly. You might think secretNumber or privateLogic() are safe, but: • Anyone can read the storage slot using tools like ethers.js, cast, or web3.eth.getStorageAt(). • Private functions can be executed indirectly by simulating transactions or calling them through internal mechanisms if reachable. private and internal in Solidity are access modifiers, not encryption mechanisms. If it’s on-chain, it’s public. Always. Never store secrets, keys, or sensitive logic on-chain. Use off-chain storage, encryption, or zero-knowledge proofs if you really need privacy. #Solidity #Web3 #Blockchain #SmartContracts #Ethereum #Web3Security #EVM #Hardhat #SolidityTips #Cybersecurity

Deepfakes and scams are flooding Web3, and the consequences are only growing. Imagine if every platform could verify content as human- or AI-generated in real time. Every post, every message, every contract- instantly validated. This kind of real-time content authentication wouldn’t just protect users; it would set a new standard for accountability and trust in the ecosystem. The next crypto bull run won’t just be about speculation or hype—it will be defined by security, transparency, and trustworthiness. Platforms that can proactively defend users against deepfakes and scams won’t just survive; they’ll thrive. Is anyone in Web3 already working on solutions for AI-generated content prevention? I’d love to connect and learn more. #Web3Security #CryptoTrust #DeepfakeDetection #AIinBlockchain #CryptoInnovation #BlockchainSecurity #DigitalTrust #Web3Safety #CryptoSafety #AIContentVerification #TrustInWeb3 #Web3Integrity #ScamPrevention #CryptoCompliance #NextGenBlockchain

The Ethereum Foundation has launched a dedicated privacy research cluster, pairing zero-knowledge R&D, private payments and a new Institutional Privacy Task Force to wrestle with privacy and compliance. This could make privacy tools default across Ethereum, from Kohaku wallets to selective identity proofs, while giving institutions a playbook for regulated adoption. Read Moses Edozie’s quick briefing to see what’s next for Web3: https://lnkd.in/dWPzjbqu #Ethereum #Blockchain #Privacy #ZeroKnowledge #zkp #Web3 #Crypto #EthereumFoundation #CryptoRegulation #BlockchainPrivac

What truly makes a blockchain secure in 2025? It’s not just about cryptography anymore—it’s about creativity, community, and constant vigilance! At BlockDAG, we combine Bitcoin’s strong decentralization with the fast speed and scalability of DAG technology. This combination creates a blockchain that’s not only quick but fundamentally secure. Here’s what makes BlockDAG’s security unique: • Thorough audits—both internal and external—to identify vulnerabilities before they become risks. • An active, community-driven bug bounty program that turns white-hat hackers into our frontline defenders. • Eco-friendly consensus methods that reduce energy use without sacrificing security. • Smooth EVM compatibility, allowing developers to build secure, interoperable dApps easily. Why does this matter to you? Because in 2025, security isn’t a luxury—it’s the foundation of trust and adoption. Investors want confidence. Developers want solid platforms. Users want peace of mind. BlockDAG leads the way by delivering on all fronts: speed, security, scalability, and sustainability. Ready to join the blockchain movement that’s setting the standard for security in the years ahead? What security features do you think will be essential in blockchain’s future? Let’s discuss below!

🔒 Blockchain Security Fluctuate Because trust in this space never stops evolving. The more time I spend working in blockchain security, the more I realize one simple truth. Everything moves. Technology, governance, regulation, even the threats themselves, hey all fluctuate. Sometimes I stop mid-day and realize how fast this ecosystem shifts. One moment, we’re securing stablecoin rails, and the next, we’re debating key management models or auditing a new L2 bridge that didn’t exist six months ago. Blockchain security fluctuates. Not because the fundamentals are wrong. It’s because innovation doesn’t wait for perfect controls. Every line of code, every governance vote, every new layer introduces new risk and new opportunity. That’s what keeps me passionate about this space. It’s never “done.” It’s always learning, adjusting, adapting. It’s that constant movement is what makes true digital trust so hard and so worth building. #Blockchain #CyberSecurity #Innovation #RiskManagement #Web3 #DigitalTrust #BlockchainSecurity #DLT #Kinexys

Your identity. Your control. Decentralized IDs are redefining privacy and compliance in Web3: secure, user-owned and regulation-ready. The future of digital identity is self-sovereign. #Web3 #DecentralizedID #Privacy #Blockchain #DID

🔒 Why Blockchain Security Matters Picture a digital vault where thousands of people store their money, contracts, and even identities. Now imagine that vault has no guard at the door instead, it protects itself automatically with math, code, and global teamwork. That’s what blockchain security is all about. At its core, blockchain is designed to be tamper-proof. Every transaction is recorded in blocks, linked together like an unbreakable chain. Once added, those records can’t be changed without the entire network noticing. Key pillars of blockchain security: 1. Decentralization – No single person or company controls it, making attacks harder. 2. Encryption – Data is locked with cryptographic keys so only the rightful owner can access it. 3. Consensus – Transactions are only approved if the majority of the network agrees they’re valid. 4. Transparency – Everyone can see what’s happening, which makes fraud easier to spot. In simple terms: Blockchain security means your data isn’t just locked in one place, it’s secured across the world, with millions of eyes watching, and math making sure no one cheats. #BlockchainEducation #LearnTech #Web3Education #BlockchainSecurity

Security researchers at Koi have discovered a crypto-stealing worm that is targeting VS Code extensions on the Open VSX and Microsoft VSCode marketplaces. Considering the worm: *Uses the blockchain for C2 (with fallback to Google Calendar) *Steals credentials to propagate via backdooring further extensions *Hides its injected code from review with invisible unicode characters *Drops a proxy, WebRTC and a VNC server *And can steal crypto from 49 different wallets ... … We can’t help but tip our hat to whoever came up with this one. Find this week's Risky Business episode at the links below. Audio: https://risky.biz/RB811/ Video: https://lnkd.in/gXQ9-MNv

🔒 A hack happened. What's next? With Ethernal Security, it's not just a fix—it's a fortress. Our Protocol Design Review, led by cryptography professors, strengthens Web3 protocols with cutting-edge methods. Supporting Cosmos, Ethereum, and beyond, we deliver robust, scalable solutions to restore trust and optimize performance for DeFi, blockchain infrastructure, and enterprise applications. ✅ Post-incident recovery for lasting resilience ✅ Vulnerability analysis and architectural upgrades ✅ Collaborative design for evolving protocols 📊 Building trust: Comprehensive audits for Web3 security. 👉 Ready to fortify your protocol with confidence? 🔗 Explore now: https://lnkd.in/ei9fXM-Y #CryptoSecurity #CosmosSDK #Web3Resilience #Ethereum #Blockchain

How does a public system like blockchain stay so secure? One of the things that fascinates me about blockchain is how it brings trust to a trustless environment. It’s all thanks to its distributed, peer-to-peer (P2P) network. Every node in the system keeps a complete copy of the ledger, so even if one computer is compromised, thousands of others continue verifying the correct data. If a hacker wanted to change history on a blockchain with 10,000 nodes, they would need to take control of more than 5,000 of them at the same time — just to convince the rest that their version is real. In my earlier post, we saw how SHA-256 cryptography makes altering even a single block practically impossible. Now imagine trying to pull off that same attack across thousands of independent computers at the same time — all continuously checking each other’s work. That’s how blockchain achieves its resilience — not through secrecy or control, but through math, consensus, and distribution. It still amazes me that something so open can be so secure. (The diagram below shows how a tampered node — in red — gets rejected by the rest of the network.)