MFA is an effective way to provide enhanced security. Traditional usernames and passwords can be stolen, and they’ve become increasingly more vulnerable to brute force attacks. MFA creates multiple layers of security to help increase the confidence that the user requesting access is actually who they claim to be. With MFA, a cybercriminal may steal one credential but will be thwarted by having to verify identity in a different manner.
As processing speeds of CPUs have increased, brute force attacks have become a real threat. Further developments like GPGPU password cracking, rainbow tables and now the Quantum computers have provided greater advantages for the attackers. GPGPU cracking, for example, can produce more than 500,000,000 passwords per second, even on lower end gaming hardware. Depending on the particular software, rainbow tables can be used to crack 14-character alphanumeric passwords in about 160 seconds. Recently, a paper released by Google’s researchers that was briefly posted on a Nasa’s website before being removed, claimed that their processor was able to perform a calculation in three minutes and 20 seconds that would take today’s most advanced classical computer, known as Summit, approximately 10,000 years. With these capabilities, a password database alone doesn’t stand a chance against such methods when it is a real target of interest.
In the past, MFA systems typically relied upon two-factor authentication. Increasingly, vendors are using the label “multifactor” to describe any authentication scheme that requires more than one identity credential.
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