Biometric authentication poses several challenges including privacy, security, and technical issues. Using biometrics for remote authentication is not recommended due to the risk of large-scale compromises if authentication servers are attacked. Biometrics are also not unique and cannot be changed if compromised, as opposed to a password. Current biometric scanners also cannot reliably distinguish between real and artificial fingerprints. While biometrics may be convenient, the technology is still fallible and not suitable as a primary authentication method.