How can I assure customers that our site is secure?

[vozduhh]

When a customer questions whether or not our site is secure, is there some certificate/statement that I could E-mail to assure them? Should I have a statement on our site? This happens about 2-3x per week and I used to think the padlock in the lower right-hand corner indicated a secure site--am I wrong?

What do other websites do when this issue arises? I always assure the customer that the site is secure--but they don't seem satisfied. Thanks in advance for any help in this regard.

I went to Siteworx to see if I could find something and I found a SSL certificate--is that it?
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[Fishnagles]

Does your site display in the browser as http:// or https:// ?

[thoran]

well you can go for verisign . As, they are the best online security providers availble in the market. Even PAYPAL uses the same for the online security.

[zeedanjacob]

Go in for a Digital Certificate that will secure your Website. Only when you get a Digital Certificate will you get https (http secured) on your URL.

Two of the major players out there with maximum credibility are Verisign and Thawte