Copiosus
Another lame chat application
Free
1.4.3for iPhone, iPad and more
Age Rating
Copiosus Screenshots
About Copiosus
Copiosus is just another P2P chat application.
This software is provided "as is" without warranties or conditions of any kind, either expressed or implied.
Please download this app only if:
- You care about security.
- You don't care about a beautiful UI.
- You like to try apps other than WhatsApp and Signal.
Lame features:
- Send messages.
- Send files and images.
- Block users.
Other features:
- Two factor authentication
- End-to-end encryption using an asymmetric key.
- Improved end-to-end security using a security key as a second factor which encrypts data using a shared symmetric key.
- Minimal privileges required.
- No in app purchases.
- No ads.
How does end-to-end encryption work in this app:
1. Whenever you send a message M a random symmetric key R is generated
2. R is encrypted using the asymmetric (public) key of the other user resulting in A
3. M is encrypted with R resulting in N
4. If security key S is set: N is encrypted by S
5. N and A is sent to the destination
This software is provided "as is" without warranties or conditions of any kind, either expressed or implied.
Please download this app only if:
- You care about security.
- You don't care about a beautiful UI.
- You like to try apps other than WhatsApp and Signal.
Lame features:
- Send messages.
- Send files and images.
- Block users.
Other features:
- Two factor authentication
- End-to-end encryption using an asymmetric key.
- Improved end-to-end security using a security key as a second factor which encrypts data using a shared symmetric key.
- Minimal privileges required.
- No in app purchases.
- No ads.
How does end-to-end encryption work in this app:
1. Whenever you send a message M a random symmetric key R is generated
2. R is encrypted using the asymmetric (public) key of the other user resulting in A
3. M is encrypted with R resulting in N
4. If security key S is set: N is encrypted by S
5. N and A is sent to the destination
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What's New in the Latest Version 1.4.3
Last updated on Aug 15, 2022
Old Versions
* Bugfix: Crop issue when sending photos in portrait mode
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Version History
1.4.3
Aug 15, 2022
* Bugfix: Crop issue when sending photos in portrait mode
1.4.2
Jun 12, 2022
* Minor UI fixes for two factor authentication
1.4.1
Apr 13, 2022
* Two factor authentication
* Show user information in settings
* Show user information in settings
1.3.5
Dec 20, 2021
* Bugfix: Rare crash when sending file
1.3.4
Jun 26, 2021
* Check for new messages when app is in background
* Support logging to file
* Support logging to file
1.3.1
Aug 19, 2020
* Multiple lines when sending message
1.3.0
Aug 9, 2020
* Support groups
* User defined image compression
* Performance optimizations
* User defined image compression
* Performance optimizations
1.2.2
May 10, 2020
Bugfix: Rare crash
1.2.1
Dec 8, 2019
* Decrypt messages when changing security key
* Support dark mode
* Bugfix: Crash when saving images
* Support dark mode
* Bugfix: Crash when saving images
1.1.4
Aug 13, 2019
* Add support for sending iCloud and local files
* Minor UI fixes
* Minor UI fixes
1.1.2
Aug 9, 2019
Copiosus FAQ
Click here to learn how to download Copiosus in restricted country or region.
Check the following list to see the minimum requirements of Copiosus.
iPhone
Requires iOS 12.0 or later.
iPad
Requires iPadOS 12.0 or later.
iPod touch
Requires iOS 12.0 or later.
Copiosus supports English
