Communication security isn't something you set up once and forget. In 2026, the attack surface is more fragmented: SIM swapping, cloud backup leaks, group links being scraped. Here's a checklist that individuals and small teams can go through every quarter. Don't just focus on the "end-to-end encryption" label—many leaks happen outside of encryption.
1. Accounts and Devices: Plug the Holes at the Entrance
Do three things first, each of which can block most low-level attacks.
- Enable two-factor authentication, and don't use SMS. SMS verification codes can be intercepted or obtained through SIM swap attacks. Prefer an authenticator app or hardware key. If a platform only supports SMS, at least set up a separate PIN.
- Check the list of logged-in devices. Spend 2 minutes each month to kick out unrecognized devices. In small teams, personal devices of former members are often forgotten.
- Turn off cloud backup or encrypt it separately. Many communication apps back up chat history in plaintext to iCloud or Google Drive. In 2025, there was a case where attackers directly read chats that should have been end-to-end encrypted through a leaked cloud account. Turn off automatic backup in settings, or enable backup encryption.
Take Potato as an example. Its device management page lists recently active sessions and login locations. If you see an unfamiliar city, change your password immediately and log out all sessions. Don't be lazy—this is much easier than post-incident forensics.
2. Chats and Groups: Don't Let Links Become Backdoors
Groups are a disaster area for leaks. In a 200-person group, if just one person clicks the wrong link, the entire group's invite link can be forwarded to a public forum.
- Use invite link expiration. Potato groups can set links to expire after 24 hours or 7 days, and can also be manually reset. When adding people to a small team, don't use permanent links.
- Enable "new members require admin approval." This blocks automated crawlers and spam accounts. For teams under 50 people, this switch hardly affects efficiency.
- Use "private groups" or "channels" for sensitive discussions. Private groups cannot forward messages, and only admins can speak in channels. Regular group chats are fine for daily syncs, but not for contracts or customer data.
- Check file transfer permissions. By default, everyone can send files, which makes it easy to mix in malicious documents. Change it to admin-only file sending, or restrict file types.
A specific scenario: a 12-person design team shares client quotes in a Potato group. They enabled "forwarding prohibited" and "screenshot alerts," and set the group link to be valid for 1 day. No quote leaks occurred within half a year. The cost was just one extra tap on "generate new link" each time they added someone.
3. Calls, Files, and Metadata: Easily Overlooked Corners
Encrypted calls are now widespread, but metadata—who called whom and when, file sizes, IP addresses—is often unprotected.
- Verify the other party's identity before a call. Use a security code or a short voice verification. Potato's call interface can display a security code; both parties compare whether the numbers match. If they don't, hang up.
- Use "view once" or password protection for file transfers. When sending contracts or ID photos, set view limits and expiration times. Don't just drag them into a regular chat box.
- Regularly clear chat history and cache. If your phone is lost, local cache may contain unencrypted images. Set auto-delete: for example, clear all media files after 7 days.
- Watch out for IP leaks. Voice calls may expose your IP. If you require high anonymity, use a trusted VPN or Tor. But don't enable multiple proxies at the same time—that actually increases your fingerprint.
Small teams can designate one person to do a "security inspection" every quarter: check group links, backup settings, device lists, and file permissions. It takes 10 minutes and is much less hassle than dealing with an incident afterward.
There is no perfect solution for secure communication, only consistent habits. Potato offers many fine-grained switches, but what really matters is whether you're willing to spend a few minutes opening the settings. If you haven't tried it yet, start by downloading Potato, do the first item on the checklist above—enable two-factor authentication—and then gradually adjust other options. Tools are aids; judgment is the core.
