Selecting FULL SHA-2 will issue a certificate that chains to both an intermediate and a root that also use SHA-256 hashing algorithm. Over the next several years all certificates will migrate to SHA-2 root certificates. In the meantime, anyone expecting your certificate will see that it is a full SHA-256 chain.

While SHA-256 root certificates are present in all current browsers, some of users on older browsers may not be able to access sites with FULL-SHA-2.

For maximum compatibility with client devices we recommend selecting the SHA-2 option.

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