Certificate signing request, certificate and private key settings


Settings Remark
RSA key bit length. Specifies the bit length of the public modulus m.
The setting is required.

What key length should be used for SSL certificates?
  • 384
    Too weak, this key length MUST not be used, unless you know what you are doing.

  • 512
    Too weak, this key length MUST not be used, unless you know what you are doing.

  • 1024
    The 1024 key bit length is used by most companies. However it is recommnded to upgrade to a key bit length of 2048. RSA claims that 1024-bit keys are likely to become crackable between 2006 and 2010.

  • 2048
    This is the recommended key bit length to be used for companies.
    RSA claims that 2048-bit keys are sufficient until 2030.

  • 3072
    An RSA key length of 3072 bits should be used if security is required beyond 2030.

Note 1: The certificate in the picture is using a key bit length of 1024.

Bit length of the public modulus m