SilenceIM uses AES Rijndael 256 -> RC4 (for symmetric encryption) -> PGP 4096 bit (for asymmetric encryption) in client side (browser) and transfers your messages to companions via HTTPS(wss) without store or any processing in a server side.
| Feature | SilenceIM | Cryptocat | Notes |
|---|---|---|---|
| Anonymous | true | true | |
| No history | true | false | Cryptocat saves messages in a server for a 30 minutes |
| End-to-end encryption | full | partial | |
| Transparency | true | false | • |
| Web | true | false | |
| Mobile | true | false | |
| Desktop | true | true |
- Unlike SilenceIM, where you can choose cryptography algorithms & exchange passwords/keys manually, Cryptocat password exchange is automatic and based on Diffie-Hellman protocol, which is not transparent for user and causes a potetntial risk.