Which of the following best describes the security measures used by DocuSign?

The option highlighting the encryption of documents in transit and at rest best describes the security measures employed by DocuSign. This practice is fundamental to ensuring that sensitive information remains confidential and protected from unauthorized access. Encryption in transit means that data is secured while being sent over the internet, making it difficult for malicious actors to intercept and read the information. Similarly, encryption at rest protects data stored on servers from being accessed by unauthorized parties.

In contrast to this correct answer, public access to all signed documents would compromise the confidentiality of agreements and personal information, which contradicts the principles of secure digital transactions. The use of unverified email for signers would also pose significant risks, as it would allow anyone to sign documents without proper authentication, undermining the integrity of the signing process. Lastly, a lack of security measures would render any electronic signing solution ineffective, exposing both the signers and the documents to various threats, which is not in line with the standards that DocuSign upholds.