SSL Certificates use both asymmetric(RSA 2048bit KEY) and symmetric(256bit) methods to establish a secure communication between the web-site and the web-browser.
Imporant: 1024bit keys are not supported anymore by web-browsers and operating systems, because they are considered weak and insecure.
SSL implements the asymmetric algorism to authenticate the host with a RSA 2048-bit key or 4096-bit size key.
The symmetric method, that has 256bit encryption, mainly is applied for data tranmission, when the bridge is already established.
Since January first, 2014, the 1024-bit public/private keys are considered to be no longer secure, and the SSL Certificates issued subsequently, must use at least a 2048-bit key to secure the communication and data transmission.
Therefore, to defend the Internet security, the cybersecurity industry has moved to the 2048-bit key encryption.
All the certificates with a key less than 2048-bit are exposed to be prejudiced by hackers.
That means CyberSSL.com certificates are trustworthy and secure.
Here are the least of all possible supported encyption SSL algorithms:
| Minimum supported size of SSL Keys | Size Ratio | |||
| Security (bits) | DSA | RSA | ECC | RSA/DSA to ECC |
| 112 | 2048 | 2048 | N/A | 1:09 |
| 128 | 3072 | 3072 | 256-383 | 1:12 |
| 192 | 7680 | 7680 | 384-511 | 1:20 |
RSA 2048-bit certificates are still secure, most widely used and are supported by all certificates authorities.