You can use one of the following certificate
formats to secure your archive (.car) files:
Certificate File. This certificate file option refers to a certificate that was issued by a Certificate Authority that contains a public key only. This certificate can be used to encrypt and decrypt an archive (.car) file. It cannot be used to sign a CAR file.
PKS12 File. The PKS12 File option refers to a certificate file that was issued by a Certificate Authority that contains a public and private key pair. It can be used to encrypt a .car file, decrypt a .car file, sign a .car, and verify the signature of signed .car file.
Sun Store. The Sun Store option refers to a certificate that was generated using the Key Tool utility provided with Sun Microsystems' JDK 1.3. This certificate contains a public and private key pair and supports the ability to sign a CAR file.
Note: To sign an archive, a certificates is required. It also can be used to encrypt an archive file. However, we recommend that for encrypting large CAR files to use the RSA DESX option on the Archive Security, Encrypt tab. The RSA DESX option is a fast and secure way to encrypt a CAR file and it does not require you to obtain a certificate.