How to send files securely
Secure file sending is more than adding encryption. You also need the correct recipient, a trustworthy link, limited access time, an integrity check, and a plan for what remains after the transfer.
By PixoPublished
Classify the file before choosing a channel
A public brochure and an identity document do not need the same controls. Consider confidentiality, file size, retention requirements, the recipient's device, and whether an account or audit trail is required. Follow your organization's approved systems when policy applies.
Verify the person, not only the address
A correctly encrypted transfer to an attacker is still a breach. Confirm the recipient using an existing contact method. For sensitive transfers, compare a short verification code or contact the recipient separately before approval.
Limit link exposure
Prefer one-time rooms or links with a short expiry. Do not post transfer links in public channels. When possible, send the link and any separate secret through different trusted paths, and revoke access after completion.
Reduce what the file reveals
Remove unnecessary EXIF location data, redact screenshots, use a neutral filename, and send only the required pages or files. Encryption protects the transfer path; it does not remove sensitive content from the artifact.
Confirm integrity and cleanup
A digest such as SHA-256 can confirm that the complete bytes arrived unchanged. Open the saved file, confirm the expected content, and remove abandoned partial files or temporary exports. Keep required records according to policy, not convenience.