Yesterday, in support of the anti-SOPA movement, internet search giant Google's homepage displayed a "thick black censorship stamp" across the multi coloured company logo. When users clicked on the stamp, it redirected the users to the "End Piracy, Not Liberty" petition.

The petition requires the user to sign on to support the protest against two 'anti-piracy' laws which are currently before the US Congress, Cnet reports.

The petition states: "Millions of Americans oppose SOPA and PIPA because these bills would censor the Internet and slow economic growth in the U.S.," it continues further, "sign this petition urging Congress to vote NO on PIPA and SOPA before it is too late."

During this day long action more than a million people signed the petition. According to Christine Chen, a Google spokesperson, the number had reached 4.5 million signatories by 4:30 pm ET, and that figure is going up by the second.

There are a number of other web giants who are protesting against these two laws; for example, on Wednesday, Wikipedia decided to shut down the English language version of their website for 24 hours. Others opposing these laws are Facebook, Twitter and Amazon to mention but a few.