To perform cryptographic operations (signature/verification and encryption/decryption), you will need keys.
JWK object is part of the
composer require web-token/jwt-core
A JWK object represents a key. It contains all parameters needed by the algorithm and also information parameters.
This framework is able to create private and public keys easily. It can also generate those keys from external resources.
The keys can be grouped in key sets. A
JWKSet object represents a key set. It can contain as many keys as you need.