On the Key Properties page, select the type of the key to be generated. You can select to generate either an RSA or a DSA key, and select the key length.
Figure : Selecting the key type
Select the type of the key to be generated. Available options are DSA or RSA.
Select the length (complexity) of the key to be generated. Available options are 768, 1024, 2048 or 3072 bits. Larger keys are more secure, but also slower to use. The recommended key length for most occasions is 2048 bits.