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A JSON object that represents a cryptographic key. The members of the object represent properties of the key, including its value.

### Schema

#### Elements  
| Name | Required | Type | Description |  
| --- | --- | --- | --- |  
| active |  | boolean | Details<br>Whether this key is in active use. |  
| alg | ✓ | string | Details<br>The specific cryptographic algorithm used with the key. |  
| kty | ✓ | string | Details<br>The family of cryptographic algorithms used with the key. |  
| use |  | string | Details<br>How the key was meant to be used; sig represents the signature. |  
| key_ops |  | string\[\] | Details<br>The operation(s) for which the key is intended to be used. |  
| x5c |  | string\[\] | Details<br>The x.509 certificate chain. The first entry in the array is the certificate to use for token verification; the other certificates can be used to verify this first certificate. |  
| n |  | string | Details<br>The modulus for the RSA public key. |  
| e |  | string | Details<br>The exponent for the RSA public key. |  
| kid |  | string | Details<br>The unique identifier for the key. |  
| x5t |  | string | Details<br>The thumbprint of the x.509 cert (SHA-1 thumbprint). |  
| d |  | string | Details<br>The exponent for the RSA private key. |  
| p |  | string | Details<br>The first prime factor. |  
| q |  | string | Details<br>The second prime factor. |  
| dp |  | string | Details<br>The first factor CRT exponent. |  
| dq |  | string | Details<br>The second factor CRT exponent. |  
| qi |  | string | Details<br>The first CRT coefficient. |  
| x |  | string | Details<br>The x coordinate of the elliptic curve point (base64url encoded). |  
| y |  | string | Details<br>The y coordinate of the elliptic curve point (base64url encoded). |  
| crv |  | string | Details<br>The cryptographic curve identifier (e.g., 'P-256', 'P-384', 'P-521'). |

#### Search Parameters

| Name | Type | Description | Expression |  
| --- | --- | --- | --- |  
| active | token | Whether the JWK is active | JsonWebKey.active |

#### Inherited Elements

| Name | Required | Type | Description |  
| --- | --- | --- | --- |  
| id |  | string | Logical id of this artifact<br>Details<br>The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. |  
| meta |  | [Meta](/content/docs/api/fhir/datatypes/meta/index.html) | Details<br>The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource. |  
| implicitRules |  | uri | Details<br>A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc. |  
| language |  | code | Details<br>The base language in which the resource is written. |  
| text |  | [Narrative](/content/docs/api/fhir/datatypes/narrative/index.html) | Text summary of the resource, for human interpretation<br>Details<br>A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety. |  
| contained |  | Resource\[\] | Contained, inline Resources<br>Details<br>These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope. |  
| extension |  | [Extension](/content/docs/api/fhir/datatypes/extension/index.html)\[\] | Additional content defined by implementations<br>Details<br>May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. |  
| modifierExtension |  | [Extension](/content/docs/api/fhir/datatypes/extension/index.html)\[\] | Extensions that cannot be ignored<br>Details<br>May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.<br>Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself). |

- [Elements](/content/docs/api/fhir/medplum/jsonwebkey#elements/index.html)
- [Search Parameters](/content/docs/api/fhir/medplum/jsonwebkey#search-parameters/index.html)
- [Inherited Elements](/content/docs/api/fhir/medplum/jsonwebkey#inherited-elements/index.html)