Values for security trust assurance metadata observation made about the digital quality or reliability of a trust assertion, activity, capability, information exchange, mechanism, process, or protocol.

The value assigned as the indicator of the digital quality or reliability of the verification and validation process used to verify the claimed identity of an entity by securely associating an identifier and its authenticator. [Based on ISO 7498-2]

For example, the degree of confidence in the vetting process used to establish the identity of the individual to whom the credential was issued, and 2) the degree of confidence that the individual who uses the credential is the individual to whom the credential was issued. [OMB M-04-04 E-Authentication Guidance for Federal Agencies]

Indicator of low digital quality or reliability of the digital reliability of the verification and validation process used to verify the claimed identity of an entity by securely associating an identifier and its authenticator. [Based on ISO 7498-2]

The degree of confidence in the vetting process used to establish the identity of the individual to whom the credential was issued, and 2) the degree of confidence that the individual who uses the credential is the individual to whom the credential was issued. [OMB M-04-04 E-Authentication Guidance for Federal Agencies]

Low authentication level of assurance indicates that the relying party may have little or no confidence in the asserted identity's validity. Level 1 requires little or no confidence in the asserted identity. No identity proofing is required at this level, but the authentication mechanism should provide some assurance that the same claimant is accessing the protected transaction or data. A wide range of available authentication technologies can be employed and any of the token methods of Levels 2, 3, or 4, including Personal Identification Numbers (PINs), may be used. To be authenticated, the claimant must prove control of the token through a secure authentication protocol. At Level 1, long-term shared authentication secrets may be revealed to verifiers. Assertions issued about claimants as a result of a successful authentication are either cryptographically authenticated by relying parties (using approved methods) or are obtained directly from a trusted party via a secure authentication protocol. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of basic digital quality or reliability of the digital reliability of the verification and validation process used to verify the claimed identity of an entity by securely associating an identifier and its authenticator. [Based on ISO 7498-2]

The degree of confidence in the vetting process used to establish the identity of the individual to whom the credential was issued, and 2) the degree of confidence that the individual who uses the credential is the individual to whom the credential was issued. [OMB M-04-04 E-Authentication Guidance for Federal Agencies]

Basic authentication level of assurance indicates that the relying party may have some confidence in the asserted identity's validity. Level 2 requires confidence that the asserted identity is accurate. Level 2 provides for single-factor remote network authentication, including identity-proofing requirements for presentation of identifying materials or information. A wide range of available authentication technologies can be employed, including any of the token methods of Levels 3 or 4, as well as passwords. Successful authentication requires that the claimant prove through a secure authentication protocol that the claimant controls the token. Eavesdropper, replay, and online guessing attacks are prevented. Long-term shared authentication secrets, if used, are never revealed to any party except the claimant and verifiers operated by the CSP; however, session (temporary) shared secrets may be provided to independent verifiers by the CSP. Approved cryptographic techniques are required. Assertions issued about claimants as a result of a successful authentication are either cryptographically authenticated by relying parties (using approved methods) or are obtained directly from a trusted party via a secure authentication protocol. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of medium digital quality or reliability of the digital reliability of verification and validation of the process used to verify the claimed identity of an entity by securely associating an identifier and its authenticator. [Based on ISO 7498-2]

The degree of confidence in the vetting process used to establish the identity of the individual to whom the credential was issued, and 2) the degree of confidence that the individual who uses the credential is the individual to whom the credential was issued. [OMB M-04-04 E-Authentication Guidance for Federal Agencies]

Medium authentication level of assurance indicates that the relying party may have high confidence in the asserted identity's validity. Level 3 is appropriate for transactions that need high confidence in the accuracy of the asserted identity. Level 3 provides multifactor remote network authentication. At this level, identity-proofing procedures require verification of identifying materials and information. Authentication is based on proof of possession of a key or password through a cryptographic protocol. Cryptographic strength mechanisms should protect the primary authentication token (a cryptographic key) against compromise by the protocol threats, including eavesdropper, replay, online guessing, verifier impersonation, and man-in-the-middle attacks. A minimum of two authentication factors is required. Three kinds of tokens may be used:

• "soft" cryptographic token, which has the key stored on a general-purpose computer,
• "hard" cryptographic token, which has the key stored on a special hardware device, and
• "one-time password" device token, which has symmetric key stored on a personal hardware device that is a cryptographic module validated at FIPS 140-2 Level 1 or higher. Validation testing of cryptographic modules and algorithms for conformance to Federal Information Processing Standard (FIPS) 140-2, Security Requirements for Cryptographic Modules, is managed by NIST.

Authentication requires that the claimant prove control of the token through a secure authentication protocol. The token must be unlocked with a password or biometric representation, or a password must be used in a secure authentication protocol, to establish two-factor authentication. Long-term shared authentication secrets, if used, are never revealed to any party except the claimant and verifiers operated directly by the CSP; however, session (temporary) shared secrets may be provided to independent verifiers by the CSP. Approved cryptographic techniques are used for all operations. Assertions issued about claimants as a result of a successful authentication are either cryptographically authenticated by relying parties (using approved methods) or are obtained directly from a trusted party via a secure authentication protocol. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of high digital quality or reliability of the digital reliability of the verification and validation process used to verify the claimed identity of an entity by securely associating an identifier and its authenticator. [Based on ISO 7498-2]

The degree of confidence in the vetting process used to establish the identity of the individual to whom the credential was issued, and 2) the degree of confidence that the individual who uses the credential is the individual to whom the credential was issued. [OMB M-04-04 E-Authentication Guidance for Federal Agencies]

High authentication level of assurance indicates that the relying party may have very high confidence in the asserted identity's validity. Level 4 is for transactions that need very high confidence in the accuracy of the asserted identity. Level 4 provides the highest practical assurance of remote network authentication. Authentication is based on proof of possession of a key through a cryptographic protocol. This level is similar to Level 3 except that only “hard� cryptographic tokens are allowed, cryptographic module validation requirements are strengthened, and subsequent critical data transfers must be authenticated via a key that is bound to the authentication process. The token should be a hardware cryptographic module validated at FIPS 140-2 Level 2 or higher overall with at least FIPS 140-2 Level 3 physical security. This level requires a physical token, which cannot readily be copied, and operator authentication at Level 2 and higher, and ensures good, two-factor remote authentication.

Level 4 requires strong cryptographic authentication of all parties and all sensitive data transfers between the parties. Either public key or symmetric key technology may be used. Authentication requires that the claimant prove through a secure authentication protocol that the claimant controls the token. Eavesdropper, replay, online guessing, verifier impersonation, and man-in-the-middle attacks are prevented. Long-term shared authentication secrets, if used, are never revealed to any party except the claimant and verifiers operated directly by the CSP; however, session (temporary) shared secrets may be provided to independent verifiers by the CSP. Strong approved cryptographic techniques are used for all operations. All sensitive data transfers are cryptographically authenticated using keys bound to the authentication process. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

The value assigned as the indicator of the digital quality or reliability of a defined sequence of messages between a Claimant and a Verifier that demonstrates that the Claimant has possession and control of a valid token to establish his/her identity, and optionally, demonstrates to the Claimant that he or she is communicating with the intended Verifier. [Based on NIST SP 800-63-2]

Indicator of the low digital quality or reliability of a defined sequence of messages between a Claimant and a Verifier that demonstrates that the Claimant has possession and control of a valid token to establish his/her identity, and optionally, demonstrates to the Claimant that he or she is communicating with the intended Verifier. [Based on NIST SP 800-63-2]

Low authentication process level of assurance indicates that (1) long-term shared authentication secrets may be revealed to verifiers; and (2) assertions and assertion references require protection from manufacture/modification and reuse attacks. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of the basic digital quality or reliability of a defined sequence of messages between a Claimant and a Verifier that demonstrates that the Claimant has possession and control of a valid token to establish his/her identity, and optionally, demonstrates to the Claimant that he or she is communicating with the intended Verifier. [Based on NIST SP 800-63-2]

Basic authentication process level of assurance indicates that long-term shared authentication secrets are never revealed to any other party except Credential Service Provider (CSP). Sessions (temporary) shared secrets may be provided to independent verifiers by CSP. Long-term shared authentication secrets, if used, are never revealed to any other party except Verifiers operated by the Credential Service Provider (CSP); however, session (temporary) shared secrets may be provided to independent Verifiers by the CSP. In addition to Level 1 requirements, assertions are resistant to disclosure, redirection, capture and substitution attacks. Approved cryptographic techniques are required. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of the medium digital quality or reliability of a defined sequence of messages between a Claimant and a Verifier that demonstrates that the Claimant has possession and control of a valid token to establish his/her identity, and optionally, demonstrates to the Claimant that he or she is communicating with the intended Verifier. [Based on NIST SP 800-63-2]

Medium authentication process level of assurance indicates that the token can be unlocked with password, biometric, or uses a secure multi-token authentication protocol to establish two-factor authentication. Long-term shared authentication secrets are never revealed to any party except the Claimant and Credential Service Provider (CSP).

Authentication requires that the Claimant prove, through a secure authentication protocol, that he or she controls the token. The Claimant unlocks the token with a password or biometric, or uses a secure multi-token authentication protocol to establish two-factor authentication (through proof of possession of a physical or software token in combination with some memorized secret knowledge). Long-term shared authentication secrets, if used, are never revealed to any party except the Claimant and Verifiers operated directly by the CSP; however, session (temporary) shared secrets may be provided to independent Verifiers by the CSP. In addition to Level 2 requirements, assertions are protected against repudiation by the Verifier.

Indicator of the high digital quality or reliability of a defined sequence of messages between a Claimant and a Verifier that demonstrates that the Claimant has possession and control of a valid token to establish his/her identity, and optionally, demonstrates to the Claimant that he or she is communicating with the intended Verifier. [Based on NIST SP 800-63-2]

High authentication process level of assurance indicates all sensitive data transfer are cryptographically authenticated using keys bound to the authentication process. Level 4 requires strong cryptographic authentication of all communicating parties and all sensitive data transfers between the parties. Either public key or symmetric key technology may be used. Authentication requires that the Claimant prove through a secure authentication protocol that he or she controls the token. All protocol threats at Level 3 are required to be prevented at Level 4. Protocols shall also be strongly resistant to man-in-the-middle attacks. Long-term shared authentication secrets, if used, are never revealed to any party except the Claimant and Verifiers operated directly by the CSP; however, session (temporary) shared secrets may be provided to independent Verifiers by the CSP. Approved cryptographic techniques are used for all operations. All sensitive data transfers are cryptographically authenticated using keys bound to the authentication process. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

The value assigned as the indicator of the high quality or reliability of the statement from a Verifier to a Relying Party (RP) that contains identity information about a Subscriber. Assertions may also contain verified attributes.

Indicator of the low quality or reliability of the statement from a Verifier to a Relying Party (RP) that contains identity information about a Subscriber. Assertions may also contain verified attributes.

Assertions and assertion references require protection from modification and reuse attacks. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of the basic quality or reliability of the statement from a Verifier to a Relying Party (RP) that contains identity information about a Subscriber. Assertions may also contain verified attributes.

Assertions are resistant to disclosure, redirection, capture and substitution attacks. Approved cryptographic techniques are required for all assertion protocols. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of the medium quality or reliability of the statement from a Verifier to a Relying Party (RP) that contains identity information about a Subscriber. Assertions may also contain verified attributes.

Assertions are protected against repudiation by the verifier. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of the high quality or reliability of the statement from a Verifier to a Relying Party (RP) that contains identity information about a Subscriber. Assertions may also contain verified attributes.

Strongly resistant to man-in-the-middle attacks. "Bearer" assertions are not used. "Holder-of-key" assertions may be used. RP maintains records of the assertions. [Summary of the technical requirements specified in NIST SP 800-63 for the four levels of assurance defined by the December 2003, the Office of Management and Budget (OMB) issued Memorandum M-04-04, E-Authentication Guidance for Federal Agencies.]

Indicator of the digital quality or reliability of the activities performed by the Credential Service Provider (CSP) subsequent to electronic authentication registration, identity proofing and issuance activities to manage and safeguard the integrity of an issued credential and its binding to an identity. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the low digital quality or reliability of the activities performed by the Credential Service Provider (CSP) subsequent to electronic authentication registration, identity proofing and issuance activities to manage and safeguard the integrity of an issued credential and its binding to an identity. Little or no confidence that an individual has maintained control over a token that has been entrusted to him or her and that that token has not been compromised. Characteristics include weak identity binding to tokens and plaintext passwords or secrets not transmitted across a network. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the basic digital quality or reliability of the activities performed by the Credential Service Provider (CSP) subsequent to electronic authentication registration, identity proofing and issuance activities to manage and safeguard the integrity of an issued credential and its binding to an identity. Some confidence that an individual has maintained control over a token that has been entrusted to him or her and that that token has not been compromised. Characteristics include: Verification must prove claimant controls the token; token resists online guessing, replay, session hijacking, and eavesdropping attacks; and token is at least weakly resistant to man-in-the middle attacks. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the medium digital quality or reliability of the activities performed by the Credential Service Provider (CSP) subsequent to electronic authentication registration, identity proofing and issuance activities to manage and safeguard the integrity of an issued credential and it's binding to an identity. High confidence that an individual has maintained control over a token that has been entrusted to him or her and that that token has not been compromised. Characteristics include: Ownership of token verifiable through security authentication protocol and credential management protects against verifier impersonation attacks. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the high digital quality or reliability of the activities performed by the Credential Service Provider (CSP) subsequent to electronic authentication registration, identity proofing and issuance activities to manage and safeguard the integrity of an issued credential and it's binding to an identity. Very high confidence that an individual has maintained control over a token that has been entrusted to him or her and that that token has not been compromised. Characteristics include: Verifier can prove control of token through a secure protocol; credential management supports strong cryptographic authentication of all communication parties. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the quality or reliability in the process of ascertaining that an individual is who he or she claims to be.

Indicator of low digital quality or reliability in the process of ascertaining that an individual is who he or she claims to be. Requires that a continuity of identity be maintained but does not require identity proofing. [Based on Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of some digital quality or reliability in the process of ascertaining that that an individual is who he or she claims to be. Requires identity proofing via presentation of identifying material or information. [Based on Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of high digital quality or reliability in the process of ascertaining that an individual is who he or she claims to be. Requires identity proofing procedures for verification of identifying materials and information. [Based on Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of high digital quality or reliability in the process of ascertaining that an individual is who he or she claims to be. Requires identity proofing procedures for verification of identifying materials and information. [Based on Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the digital quality or reliability in the process of establishing proof of delivery and proof of origin. [Based on ISO 7498-2]

Indicator of low digital quality or reliability in the process of establishing proof of delivery and proof of origin. [Based on ISO 7498-2]

Indicator of basic digital quality or reliability in the process of establishing proof of delivery and proof of origin. [Based on ISO 7498-2]

Indicator of medium digital quality or reliability in the process of establishing proof of delivery and proof of origin. [Based on ISO 7498-2]

Indicator of high digital quality or reliability in the process of establishing proof of delivery and proof of origin. [Based on ISO 7498-2]

Indicator of the digital quality or reliability of the information exchange between network-connected devices where the information cannot be reliably protected end-to-end by a single organization's security controls. [Based on NIST SP 800-63-2]

Indicator of low digital quality or reliability of the information exchange between network-connected devices where the information cannot be reliably protected end-to-end by a single organization's security controls. [Based on NIST SP 800-63-2]

Indicator of basic digital quality or reliability of the information exchange between network-connected devices where the information cannot be reliably protected end-to-end by a single organization's security controls. [Based on NIST SP 800-63-2]

Indicator of medium digital quality or reliability of the information exchange between network-connected devices where the information cannot be reliably protected end-to-end by a single organization's security controls. [Based on NIST SP 800-63-2]

Indicator of high digital quality or reliability of the information exchange between network-connected devices where the information cannot be reliably protected end-to-end by a single organization's security controls. [Based on NIST SP 800-63-2]

Indicator of the digital quality or reliability of single and multi-token authentication. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the low digital quality or reliability of single and multi-token authentication. Permits the use of any of the token methods of Levels 2, 3, or 4. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the basic digital quality or reliability of single and multi-token authentication. Requires single factor authentication using memorized secret tokens, pre-registered knowledge tokens, look-up secret tokens, out of band tokens, or single factor one-time password devices. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the medium digital quality or reliability of single and multi-token authentication. Requires two authentication factors. Provides multi-factor remote network authentication. Permits multi-factor software cryptographic token. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]

Indicator of the high digital quality or reliability of single and multi-token authentication. Requires token that is a hardware cryptographic module validated at validated at Federal Information Processing Standard (FIPS) 140-2 Level 2 or higher overall with at least FIPS 140-2 Level 3 physical security. Level 4 token requirements can be met by using the PIV authentication key of a FIPS 201 compliant Personal Identity Verification (PIV) Card. [Electronic Authentication Guideline - Recommendations of the National Institute of Standards and Technology, NIST Special Publication 800-63-1, Dec 2011]