Int allowed u/s 24b

you are not eligible to claim sec. 24b & sec 80c, as bank certificate is miss

You can claim deduction irrespective of the nature of loan( personal, mortgage, secured, unsecured).

The loan should be used for purpose of purchase, construction or renewal of house.

Therefore you can claim such deduction.

For more information you can visit - https://taxadda.com/income-tax/house-property/deduction-of-interest-sec-24b/

or 

https://taxadda.com/income-tax/deductions/insurance-ppf-repayment-of-loan-and-other-deductions-sec-80c/#housing

There is no deduction or exemption for Interest on Secured Loan.

Yes, you need a certificate but its not necessarily needs to be a housing loan. As you said you take loan from bank, you can easily get a certificate.