https://blog.margrop.net/en/tag/cybersecurity/ Recent content in Cybersecurity on Margrop Blog Hugo -- gohugo.io en-US Wed, 29 Jul 2026 20:30:00 +0800 https://blog.margrop.net/en/post/password-manager-master-password-encrypted-vault-math/ Wed, 29 Jul 2026 20:30:00 +0800 https://blog.margrop.net/en/post/password-manager-master-password-encrypted-vault-math/ The short answer A well-designed password manager does not merely remember a readable spreadsheet of your passwords. It stores an encrypted vault. Your master password is not normally used as the raw encryption key for every item. Instead, your device sends it through a deliberately expensive key derivation function, obtains derived key material, unlocks a randomly generated vault key, and decrypts your records locally. The server mainly stores and synchronizes ciphertext. https://blog.margrop.net/en/post/%E5%9F%9F%E5%90%8D-domain-name-internet-real-estate/ Wed, 29 Jul 2026 20:00:00 +0800 https://blog.margrop.net/en/post/%E5%9F%9F%E5%90%8D-domain-name-internet-real-estate/ <blockquote> <p><strong>The short answer</strong></p> <p>A domain name is not the website itself, and it is not merely a magical DNS record. It is closer to an Internet “street address + storefront sign + tradable property”: DNS routes visitors to a destination, registration data and account permissions determine who can manage the address, and trademark and dispute rules determine who may legitimately keep using it.</p> <p>A good domain can be worth tens of millions of dollars because it combines scarcity, memorability, brand meaning and a trusted entry point. <strong>The buyer is not paying for a few characters. The buyer is paying to remove years of naming, advertising and trust friction.</strong></p> </blockquote>