Phone Number
A communication identifier assigned by a carrier to a SIM card, used to identify a subscriber line in a mobile network; its lifecycle is controlled by the carrier, and it is changeable and transferable.
Timeline (last 90 days)
Systems that use phone numbers as primary keys may experience identity mismatches in scenarios such as number changes, shared devices, secondary SIM cards, and virtual numbers.
For third-party services that treat phone numbers as primary keys, Android's new mechanism may lead to identity confusion and misjudgment risks.
The lifecycle of a phone number is controlled by the carrier, while the lifecycle of an account is controlled by the product.
Phone numbers are suitable for one-time verification, secondary confirmation, and risk notifications, but not as a long-term identity anchor.
Phone numbers are usually tied to real-name registration with carriers, are costly to change, and in many scenarios are used as the sole means of account recovery and two-factor verification.
Once a phone number becomes a common linking point for multiple accounts, it becomes a single point of failure: an attacker only needs to control this one identifier to potentially take over all linked accounts through the "forgot password" process.
All Facts (6)
Systems that use phone numbers as primary keys may experience identity mismatches in scenarios such as number changes, shared devices, secondary SIM cards, and virtual numbers.
50%UnverifiedThe lifecycle of a phone number is controlled by the carrier, while the lifecycle of an account is controlled by the product.
50%UnverifiedPhone numbers are suitable for one-time verification, secondary confirmation, and risk notifications, but not as a long-term identity anchor.
50%UnverifiedPhone numbers are usually tied to real-name registration with carriers, are costly to change, and in many scenarios are used as the sole means of account recovery and two-factor verification.
50%UnverifiedFor third-party services that treat phone numbers as primary keys, Android's new mechanism may lead to identity confusion and misjudgment risks.
50%UnverifiedOnce a phone number becomes a common linking point for multiple accounts, it becomes a single point of failure: an attacker only needs to control this one identifier to potentially take over all linked accounts through the "forgot password" process.
50%