SMS verification, also known as SMS authentication, SMS-based two-factor authentication (2FA), or SMS one-time password (OTP), is a method used to verify a users identity through the use of a verification code sent to a smartphone via text message. It is commonly used by websites, apps, banks, and social networks to double-check a users identity after they have entered their username and password. The user then enters the verification code received via SMS to complete the login process. SMS verification is considered a form of two-factor authentication and is used as a security measure to prevent unauthorized access to accounts and transactions.
Despite its convenience, SMS verification is not without its security risks. The SMS infrastructure is often considered insecure, as it transmits, stores, and receives data in plain text, making it susceptible to interception and eavesdropping. Additionally, phone numbers used for SMS verification are generally unsecured and easy to steal, spoof, or port. Due to these vulnerabilities, SMS authentication is widely considered to be a weak form of verification by many experts.
In summary, SMS verification is a widely used method for verifying a users identity, but it is important to be aware of its security limitations and consider alternative methods for stronger authentication and security.
