Most modern SSL certificates are capable of up to 256-bit encryption. However, the actual bit rate displayed in a browser depends on two factors:
- Server Configuration: Your hosting server must be configured to support 256-bit cipher suites.
- Browser Capability: If a visitor uses an older browser that only supports 128-bit, the connection will "step down" to that level. The certificate acts as a key, but the server and browser negotiate the strongest mutually supported encryption level.