Secure File Sharing: Best Practices for Sending Sensitive Documents

## The Problem with Email Attachments Email remains the default for sending documents, but standard email has limitations: **No encryption:** Unless specifically configured, email travels without encryption. **No access control:** Once sent, you can't revoke access. **No tracking:** You don't know if or when recipients accessed files. **Size limits:** Large files may be blocked or cause problems. **Version confusion:** Recipients may have outdated versions. For sensitive documents, better options exist. ## Understanding Your Options ### Encrypted Email Email with encryption applied: **S/MIME and PGP:** End-to-end encryption using certificates. Complex to set up but secure. **Transport layer security (TLS):** Encrypts email in transit but not at rest. **Portal-based encryption:** Recipients access encrypted messages via web portal. Encrypted email works when configured correctly but adds complexity. ### Cloud Storage Sharing Sharing via cloud platforms (OneDrive, Google Drive, Dropbox, etc.): **Advantages:** - Large files handled easily - Access can be revoked - Activity tracking available - Version control - No mailbox storage consumed **Considerations:** - Recipient needs account (or uses links) - Data stored in cloud - Sharing settings need careful configuration ### Secure File Transfer Services Purpose-built secure sharing: **Features often include:** - Encryption in transit and at rest - Link expiration - Password protection - Download tracking - Access logging Options range from free consumer services to enterprise platforms. ### Encrypted Containers Encrypting files before sending: **Password-protected archives:** Zip files with passwords. Better than nothing but not highly secure. **Encrypted containers:** Tools like VeraCrypt create encrypted volumes. Strong but requires recipient to have software. ## Choosing the Right Method Consider: **Sensitivity:** How damaging would disclosure be? **Recipient capability:** What can recipients reasonably handle? **Regulatory requirements:** Do compliance obligations mandate specific methods? **Audit needs:** Do you need proof of delivery and access? ### Low Sensitivity Internal Standard email or cloud sharing usually adequate. ### Moderate Sensitivity Cloud sharing with appropriate settings: - Link expiration - Password if external - View-only if appropriate ### High Sensitivity Purpose-built secure transfer: - Encryption required - Access tracking - Expiring access - Audit logging ### Regulated Information Follow specific regulatory requirements: - Health information may require specific safeguards - Financial data may have industry standards - Check applicable requirements ## Cloud Sharing Best Practices When using cloud platforms for sharing: ### Access Controls **Specific recipients:** Share with identified people rather than "anyone with link" when possible. **Minimum permissions:** View-only unless editing is needed. **Expiration:** Set links to expire after reasonable period. **Password protection:** Add passwords for external sharing of sensitive documents. ### Sharing Settings **Check before sharing:** Review what permissions you're granting. **Audit sharing:** Periodically review what's shared and with whom. **Revoke when done:** Remove access when no longer needed. ### Organisation **Sharing folders:** Dedicated folders for external sharing simplify management. **Naming conventions:** Clear naming helps everyone understand what's shared. **Avoid personal accounts:** Use business accounts with appropriate controls. ## Common Mistakes ### Over-reliance on "Anyone with Link" Convenient but dangerous for sensitive files. Links can be forwarded, and access can't be tracked or revoked easily. ### Ignoring Download vs. View View-only access prevents downloading in the platform, but determined recipients can still capture content. ### Forgotten Shares Links shared months ago may still be active. Regular review is essential. ### Wrong Recipient Double-check recipient addresses. Autofill suggestions can cause misdirected shares. ### Unencrypted Passwords Sending password in same email as encrypted file defeats the purpose. Use different channel for passwords. ## Enterprise Considerations Larger organisations may need: **Data Loss Prevention (DLP):** Automatically detect and protect sensitive information. **Information Rights Management (IRM):** Controls that follow documents after sharing. **Secure transfer platforms:** Enterprise-grade solutions with full audit trails. **Policy enforcement:** Technical controls preventing inappropriate sharing. ## Receiving Secure Files When receiving sensitive files: **Verify sender:** Confirm requests through independent channels if unexpected. **Check links:** Hover before clicking to verify destination. **Use caution with passwords:** Legitimate senders won't include passwords in same message as encrypted files. **Download to secure location:** Don't save sensitive files to personal devices. ## Building Good Habits **Default to secure:** Make secure sharing the easy option. **Question email:** Pause before attaching sensitive files to email. **Review permissions:** Check what you're sharing before sending. **Follow up:** Remove access when sharing purpose is complete. Secure file sharing doesn't have to be complex. Choosing appropriate methods for different situations and following basic practices protects sensitive information effectively.