title: How CSP find the private key of certificate to perform cryptographic operations?
body: <p>My question is: when an application invoke CSP for performing cryptographic operation, such as signing, how CSP find private key of certifcate respectively? <br />
  If a certificate imported to cert store that the private key not in local computer (on USB token, external storage, e.g. mobile device), it can found?<br /></p>