What tool should an agent use to securely share sensitive documents?

The most appropriate tool for securely sharing sensitive documents is a secure file transfer service. These services are designed specifically to protect the confidentiality and integrity of the files being shared. They typically use encryption protocols to ensure that the data is not accessible to unauthorized users during transmission and while stored.

In contrast, other methods, such as email attachments, are often vulnerable to interception and do not provide the necessary security controls for sensitive material. Public file-sharing websites lack robust security measures and may expose documents to unauthorized access or data breaches. Regular postal mail does not guarantee the same level of security and can be susceptible to interception or loss, making it unsuitable for transmitting sensitive information.

By using a secure file transfer service, agents can ensure that sensitive documents are handled appropriately and are protected against unauthorized access, maintaining confidentiality and trust.