We would like to inform you that there is no separate password for your demat account and you can view your holding statement by logging into your netbanking account.
In case you wish to generate the password for online trading account held with HDFC Securities, request you to get in touch with our customer care department at email@example.com or call on 1800 209 9700 (Toll free number), 91-22-61411700 (Mumbai).
With reference to your query related to online purchases using HDFC Bank Debit card:
Currently the debit card can be used for making purchases from online merchants who have the "Verified by Visa/ MasterCard Secure Code" certification displayed on their web site.
In case, the web site does not have the “Verifed by Visa logo / MasterCard SecureCode" certification, we request you to make use of the Netsafe card facility.
Customer Assistance, HDFC Bank