What feature of DocuSign helps prevent unauthorized access to documents?

Two-factor authentication is a crucial security feature in DocuSign that significantly enhances the protection of sensitive documents. By requiring a second form of verification in addition to the standard password, it ensures that only authorized users can access a document or complete a transaction. This additional layer of security makes it much more difficult for unauthorized individuals to gain access, as they would not only need to know the password but also have access to the second factor, which could be a text message code, an app-generated code, or even a biometric verification.

In contrast, features like public sharing links and unlimited document sharing may facilitate easy access to documents but do not provide security controls that prevent unauthorized access. Access without passwords can be convenient but drastically lowers security. Overall, two-factor authentication stands out as the most effective means to bolster the security of document access within DocuSign.