對駭客而言，資安觀念薄弱的人就是他們的「綿羊」，綿羊牆便是針對使用會場無線網路但沒做好加密、沒有連上 HTTPS 網站的綿羊網路使用者，將其被監聽到的帳號密碼以部分馬賽克方式，投射在這面牆上！綿羊牆的設立是為了提醒大家，一般沒加密的上網是不安全的，並且提示人們如何保護自己的網路活動不至於洩露機密及個人隱私、如何安全的使用網路等。

建議大家到現場使用 VPN 建立安全通道再上網，才能做好個人的資安防護，切記要修改本機電腦的的預設閘道，否則就算撥接了 VPN 還是會被監聽到封包的喔！

For those who aren't familiar with information security , they get a nickname "sheep" for hackers. And this "Wall of sheep" would display user account and password which get pick up from the wireless network traffic because of not using encrypted protocols such as https or the other secured protocols. Only specified part of these user name and password will be shown to avoid a fully data disclosure in this event.

The purpose of "Wall of Sheep" is to remind everyone that , it is just too dangerous to use unencrypted network , and how to do it in a right way to keep privacy online.

It is strongly recommended that setup a VPN before actually using the network , and a must to change the default gateway , otherwise ,the out-going network traffic still remain unencrypted.