Perhaps the most important package of all the `@pcd/` family of packages. This package carefully defines what a `PCD` and `PCDPackage` are via typescript interfaces.

Install the `@pcd/eddsa-pcd` package with npm:

Framework-independent loader for the PCD format

<p align="center"> <h1 align="center"> @pcd/eddsa-ticket-pcd </h1> </p>

<p align="center"> <h1 align="center"> @pcd/pod-pcd </h1> </p>

A wrapper of the [Semaphore](https://semaphore.appliedzkp.org/) protocol, much like `@pcd/semaphore-group-pcd`, which enables PCD SDK-conforming applications to request, prove, and verify identity-revealing Semaphore protocol signals. I.e. you can use thi

<p align="center"> <h1 align="center"> @pcd/pod </h1> </p>

A PCD representing an email address owned by the user, as attested by the Zupass server.

<p align="center"> <h1 align="center"> @pcd/passport-interface </h1> </p>

<p align="center"> <h1 align="center"> @pcd/gpc </h1> </p>

Install the `@pcd/eddsa-frog-pcd` package with npm:

This package contains code used by the `@pcd` family of software to perform cryptographic applications, such as hashing, encrypting, and decrypting.

<p align="center"> <h1 align="center"> @pcd/gpcircuits </h1> </p>

PCD representing an RSA signature with a public-private keypair.

PCD representing an RSA signature with a public-private keypair.

<p align="center"> <h1 align="center"> @pcd/gpc-pcd </h1> </p>

A wrapper of the `Identity` object defined by the [Semaphore](https://semaphore.appliedzkp.org/) protocol. This is a sort of 'self-evident' PCD, in that it requires no proof - a private key is a private key.

Encode & Decode PCD file

This package contains an implementation of a data structure that contains all the PCDs and all the PCD packages, and enables convenient retrieval and serialization of these PCDs.

<p align="center"> <h1 align="center"> @pcd/message-pcd-ui </h1> </p>