What You Can Encrypt

Shield Platform Encryption lets you encrypt a wide variety of standard fields and custom fields. You can also encrypt files and attachments stored in Salesforce, Salesforce search indexes, and more. We continue to make more fields and files available for encryption.
Available in both Salesforce Classic (not available in all orgs) and Lightning Experience.
Available as an add-on subscription in: Enterprise, Performance, and Unlimited Editions. Requires purchasing Salesforce Shield or Shield Platform Encryption. Available in Developer Edition at no charge.