JSON Web Key
A JSON Web Key is a JSON-based representation of a cryptographic key and its associated parameters and metadata.
Secure APIs
A JSON Web Key is a JSON data structure representing a cryptographic key and its associated parameters.
- How it is used
- Uses JWKs to represent keys for validating OIDC access-token signatures and binding DPoP tokens to public keys.
- How deep it goes
- Explains definitions, important fields, JWKS lookup, and validation flow, while deferring complete JWK specification details.
- Examples
- Shows RSA and elliptic-curve JWK objects, a JWKS endpoint, and JWT headers selecting keys through kid.
- What you can do after
- Apply it via PyJWT to select a JWKS signing key and validate a token’s signature, audience, and issuer.
Spring in Action, Sixth Edition
A JSON Web Key is a JSON representation of a cryptographic key used for signing, verification, encryption, or decryption.
- How it is used
- Supplies a signing key for JWT tokens produced by an OAuth 2 authorization server.
- How deep it goes
- Works through RSA key generation and JWKSource configuration; defers resource-server setup.
- Examples
- Shows a Spring bean that generates a 2048-bit RSA key pair and exposes it through JWKSource.
- What you can do after
- Build it from scratch by configuring a JWKSource for an authorization server’s JWT signing key.
Read how Spring in Action, Sixth Edition explains JSON Web Key →
Software Security for Developers
JWK is a JSON-based standard for representing cryptographic keys and their associated metadata.
- How it is used
- Represents secret, public, and private cryptographic keys as interoperable JSON objects for distributed applications.
- How deep it goes
- Explains key components, metadata, identifiers, and distributed-system rationale without descending into cryptographic algorithm internals.
- Examples
- Uses an EC P-256 key-pair listing, hex-encoded HMAC storage, and exercises about kid and distributed exchange.
- What you can do after
- Apply it by representing and exchanging cryptographic keys in a standard JSON format across applications and organizations.
Read how Software Security for Developers explains JSON Web Key →
Related concepts
- JSON Web Signatureused by · JSON Web Signature is a JOSE standard for representing digitally signed or message-authentication-code-protected content in JSON-based form.
- JSON Web Encryptionused by · JSON Web Encryption is a JOSE standard for representing encrypted content and the information needed to decrypt and authenticate it.
- JSON Web Algorithmsuses · JSON Web Algorithms is a JOSE standard that defines string identifiers for cryptographic algorithms.
- JSONuses · JSON is a standardized, language-independent text format for representing structured data using objects, arrays, strings, numbers, Boolean values, and null.
- JSON Web Key Sethas part · A JSON Web Key Set is a JSON document containing a set of JSON Web Keys for cryptographic key distribution, typically including public keys for verifying signatures.
- key identifieruses · A key identifier is a provider-assigned identifier associated with a cryptographic or application programming key for identification, selection, or management.
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