If phone numbers were no longer needed, what would replace them for identification?

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If phone numbers were to become obsolete as a primary means of identification, their role would likely be replaced by a combination of more secure, privacy-centric, and context-aware digital identity systems. The future of identification would move beyond a single, static identifier to a more dynamic and verifiable ecosystem.

Here are the most probable replacements:

1. Decentralized Identifiers (DIDs) and Verifiable Credentials (VCs)
This is arguably the strongest contender for a post-phone morocco number database number identification system.

How it works: Individuals would create and own their own Decentralized Identifiers (DIDs), which are unique, cryptographically secure identifiers not controlled by any central authority. These DIDs would be stored in a digital wallet on their personal devices. Various organizations (universities, governments, employers, banks) would then issue Verifiable Credentials (VCs) – digital, tamper-proof proofs of attributes (e.g., "over 18," "holds a degree in X," "has a valid driver's license").
Replacement for Phone Number: Instead of sharing a phone number, you would present a specific VC linked to your DID. For example, to prove your age for an online service, you'd present a "verified 18+" credential from your wallet, without revealing your birthdate or any other PII. For communication, your DID could serve as a public address for secure, encrypted messaging.
Benefits: Enhanced privacy (selective disclosure of information), user control, stronger security (cryptographic proof), and reduced reliance on centralized databases susceptible to breaches.
2. Biometric Identification
As biometric technology advances and becomes more secure, it could serve as a direct replacement for verification.

How it works: High-accuracy biometrics like face recognition (3D mapping), fingerprint scanning, iris scanning, or even voice recognition could be used to authenticate identity. Advanced