Are Dropbox Form's encryption standards the same as Dropbox Sign's?

Yes, Dropbox Forms encryption standards are the same as Dropbox Sign's. At Dropbox Sign each of your documents is stored behind a firewall and authenticated against the sender’s session every time a request for that document is made. All communications use SSL (Secure Sockets Layer) encryption and all data is stored in a SOC 1 Type II, SOC 2 Type II, and ISO 27001 certified data center.

Here is a bit more about how your data is encrypted:

• ‍‍All Dropbox Forms documents are encrypted at rest using AES 256-bit encryption
• ‍For any document in transit to be signed, all communications are encrypted using SSL/TLS
• ‍All backups are encrypted
• HSTS is enabled (HTTP Strict Transport Security)