Many people now-a-days use Twitter and share interesting links amongst themselves. But due to Twitter’s limitation of 140 characters per message, they’re unable to use full links so they use link shortening services like bit.ly, tinyurl.com etc. These shorten links give an extra space to Twitter users to add a personal message.
Sometimes, users just want to share these links with only their friends/family but they’re accessible to general users as well. Here is a service which will password protect the shorten links so that they can share it with the ones they need to and just give password (or hint) to access it:
Password Protect Short Links
Trick.ly is a free service that shortens and password protects web links you want to share with select individuals on the internet. And rather than rope you and your contacts into a new social network, Trick.ly allows you to share with people on-the-fly.
If you want to protect secrets from the “merely curious”, Trick.ly lets you put a password on links with clues only your friends would get.
It was originally created to protect professional magicians’ best kept secrets from casual web browsers! 
Using the site is simple, just select a password and enter a password hint, and the site gives you the shortened link which can be shared with your friends.
When your friends click the so called “private short URL”, they are shown the password hint and asked to enter the password.
