* 3.4 [Use GnuTLS (for Windows) to Generate a Certificate](#using-gnu-tls)

**Note:**

* MinIO only supports keys and certificates in PEM format on Linux and Windows.
* MinIO doesn't currently support PFX certificates.

### 3.1 Use `certgen` to Generate a Certificate

Download [`certgen`](https://github.com/minio/certgen/releases/latest) for your specific operating system and platform.

        this.pfx = `data-${options.prefix || 'ty'}`;
        this.originalStartDelay = this.startDelay = options.startDelay
            || parseFloat(this.container.getAttribute(`${this.pfx}-startDelay`)) || 600;
        this.originalTypeDelay = this.typeDelay = options.typeDelay
            || parseFloat(this.container.getAttribute(`${this.pfx}-typeDelay`)) || 90;