What is Identity Proofing?

Identity proofing is the process of verifying that a person is who they claim to be during account registration or credential issuance.

This critical security procedure involves collecting, validating, and verifying identity evidence to establish confidence that an individual's claimed identity corresponds to their actual identity.

The process typically occurs in multiple stages, beginning with identity evidence collection where individuals provide documents such as driver's licenses, passports, or birth certificates. Next comes identity validation, where the authenticity and integrity of these documents are verified through various means including document security features, database checks, and cross-referencing with authoritative sources.

The final stage involves identity verification, where the person presenting the identity evidence is confirmed to be the rightful owner of that identity. This may include biometric verification, knowledge-based authentication questions, or in-person verification procedures. Identity proofing standards, such as those defined in NIST Special Publication 800-63A, establish different assurance levels based on the rigor of the proofing process. Higher assurance levels require more stringent verification procedures and are necessary for applications involving sensitive data or high-risk transactions. Effective identity proofing helps prevent identity fraud, account takeovers, and various forms of impersonation attacks while enabling organizations to establish trusted digital relationships with legitimate users.

Identity proofing has existed in some form since organizations first needed to verify people's identities, but its modern cybersecurity incarnation emerged alongside digital commerce in the 1990s. Early online systems relied heavily on knowledge-based authentication—think mother's maiden name and first pet—which provided weak assurance at best. The assumption was that only the legitimate person would know these details, an assumption that proved dangerously flawed as data breaches exposed massive troves of personal information.

The 2000s brought increased attention to identity proofing rigor as identity theft surged. Financial institutions and government agencies began developing more structured approaches, leading to frameworks like NIST's Special Publication 800-63, first published in 2006 and revised several times since. These standards introduced the concept of identity assurance levels, recognizing that different contexts require different degrees of verification certainty.

The proliferation of remote services accelerated the need for robust digital identity proofing. Physical document verification gave way to automated systems using optical character recognition, database cross-checks, and eventually biometric matching. The COVID-19 pandemic further accelerated this shift, forcing organizations to implement strong identity proofing without in-person verification. Today's approaches combine multiple verification methods, attempting to balance security requirements against user convenience in an increasingly remote world.

Identity proofing sits at the foundation of digital trust. When it fails, the consequences ripple through every security control that follows. An attacker who successfully impersonates a legitimate user during account creation gains not just initial access but often long-term persistence, as organizations naturally trust accounts they've issued credentials to. This makes identity proofing a particularly attractive target for sophisticated adversaries.

The challenge has intensified with the rise of synthetic identities—fabricated identities that combine real and fake information to create personas that pass basic verification checks. These identities can age over time, building credit histories and digital footprints that make them increasingly difficult to distinguish from legitimate users. Financial fraud involving synthetic identities costs billions annually and traditional identity proofing methods struggle to detect them.

Remote identity proofing introduces additional complications. Verifying document authenticity without physical inspection requires sophisticated analysis of security features through digital imaging. Deepfake technology and high-quality document forgeries have raised the bar for what constitutes adequate verification. Meanwhile, organizations face pressure to streamline onboarding processes, creating tension between security rigor and user experience. Regulatory requirements add another layer of complexity, as different jurisdictions mandate varying levels of identity assurance for different services. Getting identity proofing right requires balancing these competing demands while adapting to evolving attack techniques.

Plurilock's identity and access management services help organizations implement identity proofing that meets their specific assurance requirements without creating friction for legitimate users.

We assess your risk profile and regulatory obligations, then design verification workflows that provide appropriate confidence while maintaining usability.

Our practitioners bring experience from government and intelligence backgrounds where identity assurance can be a matter of national security, not just compliance. We work with your existing systems to strengthen identity proofing controls, integrate biometric verification where needed, and establish monitoring to detect suspicious patterns that might indicate proofing failures or synthetic identity fraud.