How to secure or (Ensuring Integrity) of Web Data in transit and in store?

Keep everything encrypted with SSL with a properly signed SSL certificate from a trusted CA. Web servers/certificate authorities should not give away their private SSL keys, similarly web browsers should only trust a minimal set of respected certificate authorities.

This prevents eavesdroppers from decrypting/altering¹ communications.

¹ Well they could drop packets or randomly alter a packet, which with very high probability would result in the packet being undecryptable (equivalent to dropping a packet).

Tineye says your image is from: http://www.edecision4u.com/HTTPS-SSL.html, which has its online documentation at: http://www.edecision4u.com/data/DG-HTTPS.SW.Specs.2012.doc (beware doc file). This documentation specifically states its limitation:

Note: Certificate Error Warning will appear at target user Web Browser. This problem can be resolved by having own trusted Certificate Authority (CA). For more information, please contact Decision Group.

Hence, to use this product you have to have a trusted by your browser CA to sign a certificate for your MITM attack, which valid CA should not do; however invasive governments may be able to do (especially if your browser trusts all the default CAs).