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Does the response time increase for a page with with SLL layer compared to the same page without SSL layer?
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If Yes, is that the reason that a SSL layer Encryption is added to it? Anything else which I have missed?
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Simply for the Home page, without being logged into the application, do we need to have SSL layer to our page?
Better to understand: Why we do not have SSL layer for http://www.facebook.com.
If FB is right then why we have SSL layer for home page for http://www.gmail.com?
Of course.
Encryption plus the handshake plus possible space overheads.
No, but if there is a login form in the page it is customary, so as to provide a visual assurance that the password will be encrypted.
‘We’ don’t have SSL for gmail.com. Gmail does. If you want to know why their site is built the way it is, ask them.