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E-Verify is a system to electronically verify work eligibility and operated by the Department of Homeland Security's (DHS) U.S. Citizenship and Immigration Services (USCIS) and the Social Security Administration (SSA).
The Social Security Administration (SSA) has issued more than 430 million Social Security numbers (SSN) and cards since the Social Security program began in 1935, of which an estimated 300 million belong to living number holders.
In 2002, the Social Security Administration (SSA) issued nearly 6 million new Social Security numbers (SSNs), of which 1.3 million were issued to noncitizens. Despite its narrowly intended purpose, the SSN has in practice become the national identifier.