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|
RSA 2048-bit certificates are still secure, most widely used and are supported by all certificates authorities.