Key takeaways
- End-to-end encryption means only the participants' devices can decrypt messages; the provider cannot.
- Auditable encryption protects data in transit and at rest while letting the organization keep oversight of its records.
- C Chat is not end-to-end encrypted: it uses TLS plus AES-256 at rest with per-organization keys.
- In C Chat, owners and admins can audit and export group conversations; direct messages stay private.
- Choose end-to-end encryption if no third party may ever decrypt; choose auditable if you need business records.
“Encrypted” is one of the most overused words in messaging. Almost every app encrypts something; the useful question is who holds the keys and what that allows. Business buyers often compare two models without a clear explanation of the trade-off. This page gives that explanation and says plainly where C Chat sits.
Short answer: who can decrypt
With end-to-end encryption (E2EE), messages are encrypted on the sender’s device and can only be decrypted on the recipients’ devices. The provider relays data it cannot read. The glossary entry on end-to-end encryption covers the details.
With auditable encryption, messages are encrypted while they travel and while they are stored, but the service can decrypt stored content under defined rules. That makes it possible for an organization to audit and export its own records.
C Chat uses auditable encryption. It is not end-to-end encrypted, and it does not claim to be.
How auditable vs end-to-end works in C Chat
C Chat’s model has three layers:
- TLS in transit. Messages and attachments are protected between your device and the servers. See how TLS protects messages in transit.
- AES-256 at rest, per organization. Stored content is encrypted with a key specific to your organization, explained in per-organization encryption keys.
- Access rules on top. Owners and admins can audit and export group conversations; direct messages between people are private; the platform only accesses content for moderation of reported messages or legal requirements, and logs it.
For the step-by-step flow, read how C Chat encrypts your messages.
Side-by-side comparison
| Question | End-to-end encryption | Auditable encryption (C Chat) |
|---|---|---|
| Protected in transit? | Yes | Yes, TLS |
| Protected at rest on servers? | Yes, provider cannot decrypt | Yes, AES-256 with per-organization keys |
| Can the provider decrypt? | No | Yes, only for reported-message moderation or legal requirements, logged |
| Can the business export group records? | Not from the server | Yes, owners and admins |
| Are one-to-one chats private from the employer? | Yes | Yes, direct messages are not auditable |
| Typical fit | Maximum confidentiality | Teams that need records and oversight |
What it means for owners, admins and members
For owners and admins, the deciding factor is usually records. If you run a security company, a cleaning business or a field operation, you need to know what was reported and when. Auditable encryption gives you that for group conversations without reading private one-to-one chats.
For members, the practical meaning is: group posts are part of the team’s record, direct messages are not. The page who can read my messages lists every case.
For IT and security reviewers, ask the same questions of any vendor: who holds keys, who can decrypt, is access logged, and what can the customer export. The glossary entry on audit logs explains why logging matters.
When end-to-end encryption is the better choice
Be honest about your threat model. If your main risk is the provider itself, or a legal process directed at the provider, end-to-end encryption protects you in a way auditable encryption does not. Journalists protecting sources, some legal and advocacy work, and individuals with high personal risk are typical examples.
Apps such as Signal and Threema are built around end-to-end encryption. If that property matters more to you than business records, compare them directly: see C Chat vs Signal for business and C Chat vs Threema Work.
Honest limits and caveats
- Auditable encryption requires trust in the provider’s access rules. C Chat limits platform access to moderation and legal requirements and logs it, but it is a policy plus technical control, not a mathematical impossibility.
- End-to-end encryption is not automatically “better”; it trades away server-side records and can make compliance harder for businesses that need them.
- Neither model protects against screenshots or a compromised phone.
Getting started
If your team needs records and privacy at the same time, try C Chat at getcchat.com/c: create a team, put operational work in groups and keep personal topics in direct messages. The security overview summarizes the full model.
Frequently asked questions
Is C Chat end-to-end encrypted?
No. C Chat uses auditable encryption: TLS in transit and AES-256 at rest with a key per organization. This lets team owners and admins audit and export group conversations, which end-to-end encryption would make impossible.
Is auditable encryption less secure than end-to-end encryption?
It protects against different things. End-to-end encryption also protects against the provider itself. Auditable encryption protects against interception and stored-data exposure while allowing a business to keep records, with provider access limited and logged.
Can an app with end-to-end encryption give my company chat records?
Not from the server, because the provider cannot decrypt the content. Records would have to come from users' devices or from features the app adds on top, which vary by product and plan.
Why would a business choose auditable encryption?
Because many businesses must be able to show what instructions were given, what was reported and when. Disputes, incident reviews and client reporting all rely on records the organization can access.
When is Signal or Threema a better choice than C Chat?
When your priority is that no provider can ever decrypt your messages, for example sensitive journalism or legal work where confidentiality outweighs record-keeping. Apps built around end-to-end encryption are designed for that case.