Dear Dr.Hasib Bhai,
Thank you for your clarification. I already tested the security issue by checking by the following link
http://www.cic.gc.ca/search-recherche/index-eng.aspx?search=basic&query=ciip&m=10&s=0&l=e&sites=cic;&st=r&nb=t
Well, the sharing of the file numbers and other credentials are not safe in terms of cyber crime. See, let me explain in very non technical way. Any body can design and create a website offering very lucrative service for Immigration to Canada and collect our credentials. Unless we report and take necessary actions against them, which is definitely time consuming, we are at risk. They may do the many things like,
1. Inform doubt generating false information to CIC or CHC or wherever they feel may cause harm to us.
2. Blackmail us. etc.
So, it is always wise to verify anywhere in the web to provide personal information, specially where we risk our fortune in there.
By the
Best regards,
INDIANAJONES