In November 2025, the most severe biological data breach in history occurred.
A global identity verification giant called WorldID was hacked. Overnight, the iris scan data, voiceprints, and 3D facial models of 1 billion users were packaged and sold on the dark web for 5 BTC.
This is not just a privacy breach; this is the 'death of identity.'
The next day, countless people found their bank accounts emptied because hackers easily deceived the bank's facial recognition system using AI-generated deepfake videos. Your face, your voice, your fingerprints, which were once your safest passwords, have now become your greatest vulnerabilities. You cannot change your fingerprints, nor can you reshape your irises. In the centralized finance (CeFi) system, you have become a 'naked' person. To stop the losses, banks urgently froze all transactions based on biometric verification. The global payment system was paralyzed.
In this terrifying moment of 'anyone can be you', funds are frantically seeking a refuge that 'does not rely on biometric features, but only on mathematical logic'. People are horrified to discover that the private keys, once ridiculed as 'geek toys', have become the only form of identification that cannot be forged by AI.
This is why USDD 2.0 has surged against the trend in this trust crisis. It does not look at your face, only recognizes your key.
1. Private Key: The Last Bastion of Identity
In the decentralized network of USDD 2.0, verifying a transaction does not require you to blink at a camera or enter a fingerprint. It only needs a digital signature.
No matter how advanced AI's Deepfake technology is, it cannot brute-force a 256-bit private key. The permissionless feature of USDD means you do not need to submit biometric data to any centralized institution to own assets. In this era of rampant 'fake faces', mathematical encryption is the only real defense.
2. Zero-knowledge Value Transfer
When you use USDD for transfers, you do not need to expose who you are.
Compared to the name, address, and note information attached to bank transfers, USDD's on-chain transactions are just a string of hash values. Combined with privacy protection protocols, it allows for zero-knowledge proof-style value transfer— I prove I have money and transfer it to you, but I do not need to show the world my retinal data.
3. Assets that cannot be social-engineered
Hackers can use social engineering to attack your bank's customer service, simulating your voice with AI to reset passwords. But hackers cannot 'social-engineer' a smart contract.
The non-fungible property of USDD 2.0 ensures that even if a hacker forges your identity to report a crime, they cannot freeze your funds through the protocol. Control is firmly held in the physical hardware of cold wallets, which serves as the last line of separation between the physical and digital worlds.
Disclaimer: The above content is the personal research and opinion of 'carving a boat to seek a sword', intended only for information sharing and does not constitute any investment or trading advice. The data is compiled from research reports/public information; please refer to official pages and on-chain data, DYOR.
