How to Encrypt Business Communications | InfiniTech Cornwall

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Overview

Encryption in transit vs end-to-end encryption.

Step 1: Email

Protect email contents.

1

M365 Encryption

Office Message Encryption included
Encrypt-Only or Do Not Forward
Auto-encrypt with transport rules

2

Advanced

S/MIME for certificate-based
PGP/GPG for open standard

Step 2: Messaging

Real-time communication.

1

Options

Teams: Encrypted, E2E for calls
Signal: E2E by default
Avoid SMS for sensitive content

Step 3: Policy

Set standards.

1

Framework

Define what must be encrypted
Specify approved tools
Train staff

3

File Sharing Encryption

Use encrypted file sharing instead of email for large sensitive documents
SharePoint and OneDrive encrypt at rest and in transit by default
For extra-sensitive files, use Cryptomator or 7-Zip AES-256 before uploading
Azure Information Protection encrypts documents and controls access
Set documents to expire after a defined period for time-sensitive information
Use password-protected sharing links with expiry dates

4

Verification and Training

Teach staff to verify encryption indicators: Padlock icons, HTTPS, E2E labels
Include encryption in your security awareness training programme
Create a quick-reference guide: Which tool for each communication type
Test encryption between departments to verify it works
Conduct quarterly reviews of encrypted communication compliance
Keep encryption tools updated to maintain security effectiveness

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