Category: FIDO & Passkeys
Registration Ceremony
Simply put
In identity and access management, a Registration Ceremony is the process of enrolling a new credential or authenticator for a user, such as setting up a passkey or security key so it can later be used to sign in. The evidence provided does not describe this IAM-specific meaning; the sources address marriage and civil ceremonies rather than credential registration.
Formal definition
The term "Registration Ceremony" is used in the WebAuthn/FIDO2 context to describe the sequence of steps by which an authenticator creates and registers a new public key credential with a relying party, as distinct from the corresponding Authentication Ceremony used to verify a previously registered credential. However, the evidence packet supplied contains no material on WebAuthn, FIDO2, passkeys, or any IAM registration process; the provided sources describe marriage and civil ceremonies and a general dictionary definition of "ceremony." A technically precise IAM definition cannot be substantiated from this evidence, and this entry should be revised once relevant source material (for example, the WebAuthn specification) is available.
Why it matters
In the WebAuthn/FIDO2 sense that is relevant to this publication, a Registration Ceremony is the foundational moment in a credential's lifecycle: it is where the binding between a user and a newly created public key credential is established with a relying party. The security properties of every subsequent authentication depend on the integrity of this enrollment step, which is why practitioners treat registration as a distinct, carefully governed phase separate from later verification. However, the evidence digest supplied for this entry does not address WebAuthn, FIDO2, passkeys, or any IAM credential-registration process.
Who it's relevant to
Content and editorial reviewers
This entry is flagged as unsubstantiated: the evidence digest covers marriage and civil ceremonies rather than the WebAuthn/FIDO2 credential-registration meaning intended for the glossary. Reviewers should route this term for re-sourcing against relevant IAM material before publication.
IAM engineers and authentication architects
In principle this term concerns how new authenticators (for example passkeys or security keys) are enrolled with a relying party, distinct from the Authentication Ceremony used to verify existing credentials. The provided sources do not support a technical definition, so no configuration or design guidance can be drawn from this evidence.
Inside Registration Ceremony
Ceremony Initiation
The relying party begins the registration flow, typically after the user has been identified and often authenticated by an existing method, and requests creation of a new credential for the account.
PublicKeyCredentialCreationOptions
In WebAuthn, the structured parameters the relying party passes to the authenticator via the client, including a challenge, relying party identifier, user handle, and preferences for authenticator selection and attestation.
Challenge
A server-generated random value included in the creation options to bind the ceremony to a specific request and help mitigate replay; it is echoed back in the authenticator's signed response for verification.
Credential Key Pair Generation
The authenticator generates a new asymmetric key pair, retaining the private key (bound to the authenticator or, for passkeys, potentially synced depending on the implementation) and returning the public key to the relying party.
Attestation
Optional evidence about the authenticator's provenance or characteristics conveyed in the response; the level and format requested (for example none, direct) depends on relying party policy and affects what the server can verify.
Registration Response Verification
The relying party validates the returned data, including the challenge, origin, relying party identifier, and any attestation, before associating the public key credential with the user account.
Credential Storage
On successful verification, the relying party stores the public key and credential identifier against the user record so the credential can later be used in the authentication (assertion) ceremony.
Common questions
Answers to the questions practitioners most commonly ask about Registration Ceremony.
Is the registration ceremony the same as the authentication ceremony?
No. The registration ceremony is the enrollment flow in which a new credential (in WebAuthn, a public key credential) is created and bound to a user account. The authentication ceremony is the separate, later flow in which an already-registered credential is used to verify the user. In WebAuthn terms, registration typically invokes navigator.credentials.create() while authentication invokes navigator.credentials.get(). Conflating the two obscures that registration establishes the credential and authentication exercises it.
Does completing a registration ceremony mean the user has been authenticated?
Not by itself. A registration ceremony creates and binds a credential; it is an identity-lifecycle enrollment step, not proof of who the user is on a return visit. In most deployments the relying party must first establish who the user is (identification) and often authenticate them through an existing method before or during registration, because the ceremony trusts that the session it binds the new credential to already belongs to the correct account. The credential produced can then be used for authentication in subsequent ceremonies.
What data does the relying party need to store from a WebAuthn registration ceremony?
Typically the relying party persists the credential ID, the credential public key, the signature counter (if used), and an association to the user account. Depending on configuration, additional attestation metadata, the authenticator's AAGUID, and transport hints may be retained. The private key is never sent to or stored by the relying party; it remains on the authenticator. Storage specifics vary by library and deployment, so confirm against your chosen WebAuthn implementation.
How should the server validate the response returned during a registration ceremony?
In a WebAuthn registration flow, the server generally verifies that the challenge it issued matches the one returned, that the origin and relying party ID match expectations, and that the client data type indicates a create (not a get) operation. It then processes the attestation object to extract the public key and, if attestation is being evaluated, checks the attestation statement. The exact checks are specified in the WebAuthn standard; follow the verification steps in your server-side library rather than improvising them.
What role does attestation play during registration, and when is it needed?
Attestation, when requested, lets the authenticator provide evidence about its make and model during registration, which a relying party can use to decide whether the authenticator meets policy. Many consumer deployments request no attestation or do not enforce it, while enterprise or regulated contexts may require it to restrict enrollment to approved authenticator types. Whether to require attestation, and how strictly to evaluate it, depends on your risk model and configuration; it is optional in many WebAuthn flows.
How does the registration ceremony differ when enrolling a passkey versus a device-bound credential?
The ceremony mechanics are similar, but the resulting credential's portability differs based on parameters such as resident key / discoverable credential settings and the authenticator's capabilities. A passkey is typically a discoverable credential that may be synced across a user's devices via a platform provider, whereas a device-bound credential generally stays on a single authenticator. During registration the relying party can express preferences (for example requesting a discoverable credential), but the actual behavior depends on the authenticator and platform, so treat requested parameters as preferences rather than guarantees.
Common misconceptions
The registration ceremony authenticates the user.
Registration establishes a new credential for an already-identified account; it enrolls a factor rather than performing authentication. Authentication of the user typically happens through an existing method before or alongside registration, and the newly registered credential is used for authentication in a later, separate assertion ceremony.
The private key is transmitted to and stored by the server during registration.
In WebAuthn-based registration the authenticator generates the key pair and retains the private key; only the public key and credential identifier are sent to the relying party. The server never receives the private key.
Attestation is always required and always provides strong assurance about the authenticator.
Attestation is optional and its availability and format depend on relying party configuration and the authenticator. Many deployments request no attestation, so the assurance a server can derive about authenticator provenance varies by policy and context.
Best practices
Generate a fresh, sufficiently random challenge for each registration ceremony and verify it, along with the origin and relying party identifier, when processing the response.
Confirm the user is properly identified and authenticated by an existing method before enrolling a new credential, keeping registration distinct from the authentication step.
Decide on an attestation conveyance policy (for example none versus direct) based on your actual assurance requirements rather than requesting attestation by default without a plan to evaluate it.
Store only the public key and credential identifier against the user account, and never expect or attempt to persist private key material.
Support enrolling multiple credentials per account where feasible so users have a recovery path if one authenticator is lost.
Validate the full registration response server-side before associating the credential, and reject responses whose challenge, origin, or relying party identifier do not match expectations.
