Encrypted messaging for teams.
Slack, Teams, and SMS are not built for sensitive communication. When it matters, use a tool that actually protects the content.
Most team messaging — Slack, Teams, Google Chat, standard SMS — is encrypted in transit but not end-to-end. That means the platform can read the messages, law enforcement can subpoena them, and a breach at the vendor exposes them. For day-to-day work, that's fine. For sensitive business communication, it's not.
Where default messaging falls short
When you DM a colleague in Slack with a client's SSN, that SSN is stored, retained, indexed, and visible to Slack administrators. Same for Teams. Same for SMS — actually worse, since carriers can intercept. For strategy discussions, HR matters, legal prep, security incidents, and regulated data, the default tools don't give you the privacy you'd assume.
Two real-world use cases
“A small firm's partners discussed a sensitive HR termination via Slack DMs.”
Red flag: During a later lawsuit, those Slack messages were discoverable. Would have benefited from an out-of-band channel.
“A consulting firm texted client strategy details via group SMS for "convenience."”
Red flag: One partner's phone was stolen. Full thread accessible. Client confidentiality breached, relationship lost.
What to use when it matters
- Signal for anything sensitive — end-to-end encrypted, disappearing messages, nothing retained on servers.
- Microsoft Teams with end-to-end encryption enabled for specific calls and meetings.
- Encrypted email (M365 Message Encryption, Proton, or S/MIME) for written sensitive material.
- For regulated industries, use platforms with BAAs (for HIPAA) and appropriate retention features.
Pick a secondary channel now.
Most small firms benefit from having Signal installed across leadership. Takes five minutes. Saves you during a crisis.
- 1Install Signal on all leadership and key-staff phones. Train them to use it for sensitive topics.
- 2Turn on M365 Teams end-to-end encryption for sensitive 1:1 calls.
- 3Never send SSNs, passwords, financials, or HR details via SMS or standard Slack.
- 4For regulated industries (HIPAA), review your communication stack for BAA compliance.
- 5Educate staff: not all chat platforms are created equal.
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