SecureChatUpdated
by stfu23489
SecureChatUpdated is a Fabric client mod that encrypts chat messages sent by the local player so that only other players holding the same key can read them.
What it does
Messages are protected with AES-256-GCM, an authenticated cipher, so tampered ciphertext is rejected rather than shown. The key is derived with PBKDF2 using a random salt and IV for each message. A configurable key prefix, an alphabet setting and a Base4096 encoding option control how encrypted text appears in chat, and the Base4096 encoding can be switched off. The mod also checks for replayed and expired messages, allowing one minute of clock skew, and warns when a message fails to decrypt with the current key.
Encryption can be turned on or off for the current session. Holding Shift while the chat screen is open temporarily inverts the current state, and Ctrl+Click opens the configuration screen. The mod is updated for Minecraft 26.1.x and is published for 26.1, 26.1.1 and 26.1.2, with 1.1.0 for 26.1.2 as the latest file, released on 2026-06-03. Only the client needs it, and the code is open source under the MIT License.
Key features
Authenticated encryption
Chat text is encrypted with AES-256-GCM, so altered ciphertext fails verification instead of appearing as garbled text.
Per-message key derivation
Each message uses a PBKDF2-derived key with its own random salt and IV, which limits what a single leaked message reveals.
Replay and expiry checks
Repeated and expired messages are detected, with one minute of clock skew tolerated between players.
Spoof and wrong-key detection
Fake Secure Chat prefixes are flagged, and messages encrypted with a different key are reported as undecryptable.
Toggles and configuration
Encryption can be enabled per session, Base4096 encoding can be turned off, and a configuration screen sets the key prefix and alphabet.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Simple Chat Encryption is a Fabric client mod for 26.2 – 26.3, licensed under All rights reserved and not open source. Opaque Chat is open source under the GNU General Public License v3.0 only and is published for 1.21.11 on Fabric and Quilt. Message Encryption is open source under the GNU Lesser General Public License v3.0 only, with files for Fabric and Quilt across 1.20 – 26.3. All three are client-side only, so the difference is mainly in version coverage and license.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| SecureChatUpdated | Fabric | 26.1 – 26.1.2 | Client-side only | 2026-06-03 |
| Simple Chat Encryption | Fabric | 26.2 – 26.3 | Client-side only | 2026-09-20 |
| Opaque Chat | Fabric and Quilt | 1.21.11 | Client-side only | 2026-08-01 |
| Message Encryption | Fabric and Quilt | 1.20 – 26.3 | Client-side only | 2026-10-04 |
Questions
Does SecureChatUpdated need Fabric API?
Does SecureChatUpdated have to be installed on the server?
Which versions are covered?
In the catalog
SecureChatUpdated is one of 5,392 Social mods on ModsFinder, and one of 4,084 Social mods for Fabric. 15,189 mods support Minecraft 26.1.2.
Similar mods
What the author says
An updated version of SecureChat for Minecraft 26.1.x. Click the [SCU] button in the chat screen to toggle encryption.
Official listing
- Modrinth page
- modrinth.com/mod/securechatupdated
- Owner
- stfu23489
- Published
- 2026-05-31
- Updated on Modrinth
- 2026-06-03
- Facts verified
- 2026-10-15