is a helper function that is defined in the implementation file of the Music Bundle Signature Sample.
Depending on how you have configured your application, validation may occur automatically.
Signature validity is determined by checking the authenticity of the signature’s digital ID certificate status and document integrity: When you receive a signed document, you may want to validate its signature(s) to verify the signer and the signed content.
Additional status details appear in the Signatures panel and in the Signature Properties dialog box.
When you receive a signed document, you may want to validate its signature(s) to verify the signer and the signed content.
However, it did not appear in Contacts page but appear in the Certificate page. Another problem is that i have only Adobe Reader installed but not Adobe Acrobat.
Is that the reason why I can't certify my document?
Never store or transfer the private key of an asymmetric key pair in plaintext.
For more information about symmetric and asymmetric cryptographic keys, see Generating Keys for Encryption and Decryption.
For simplicity, the function that is shown in the following sections demonstrates how to validate a single package signature with the certificate, called the signer certificate, that was used to generate the signature, without the use of a certificate chain.
This method does not show how to verify a certificate trust status by building a certificate chain.
The example retrieves an RSA public key from a key container and then uses the key to verify the signature.