|
Key Size |
Relative Security Level |
|---|---|
|
512 or 768 |
Not regarded as secure. |
|
1024 or 2048 |
Secure. |
|
3072 or 4096 |
Very secure. |
Note about key sizes: Typically, certificate authorities use key sizes of 1024 or 2048. When certificate owners wish to keep their keys for a longer duration, they choose 3072 or 4096 bit keys.