I have my own application. My client wants me to use their web service. This web service sends some data to my database. For this, my client wants a certificate from me. In this scenario, what kind of certificate should I provide?

  • 1
    What do you mean by what kind of certificate? "self signed/CA signed type" ?
    – Limit
    Jan 20, 2017 at 18:24
  • Exactly, in this scenario what kind of certificate I should send to my client? I am not sure from my end. Please advice.
    – user136861
    Jan 20, 2017 at 19:19
  • Well, CA signed is almost always the preferred choice. Self signed will become difficult to maintain
    – Limit
    Jan 20, 2017 at 19:38

2 Answers 2


A self signed certificate of sufficient key size (2048 bit) would be fine. You wouldn't need a CA signed certificate as the client can add the certificate to their credential store. Use OpenSSL for the purpose.


If the client web services have access to the internet or they have a local CA, then I would suggest that you use CA signed certificates.

Otherwise it is fine to use self signed certificates in your case but it will be a headache especially if the client has multiple web services and you want to update the certificate.

Here is a comparison of different ways to use certificates in SSL

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