protected override void StartEncryptionCore(SecurityToken token, SecurityKeyIdentifier keyIdentifier)
{
this.encryptingSymmetricAlgorithm = SecurityUtils.GetSymmetricAlgorithm(this.EncryptionAlgorithm, token);
if (this.encryptingSymmetricAlgorithm == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(
SR.GetString(SR.UnableToCreateSymmetricAlgorithmFromToken, this.EncryptionAlgorithm)));
}
this.encryptionKeyIdentifier = keyIdentifier;
this.referenceList = new ReferenceList();
}
