"I know that if you're trying to catch terrorists it's really tempting to demand to be able to break all that encryption," Berners-Lee told the BBC.
"But if you break that encryption then guess what -- so could other people, and guess what -- they may end up getting better at it than you are," he warned.
The computer scientist, who is credited with inventing the world wide web, was speaking after the British government called for a crackdown on encryption following last month's terror attack at the parliament in London.
Berners-Lee today was named as winner of the Turing Prize for computing, named after British wartime codebreaker Alan Turing, which comes with a USD 1 million (938,000 euro) grant from Google.
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He also slammed new legislation introduced in Britain last year -- which was quickly dubbed the "Snoopers' Charter" by the media -- which gives authorities the power to gather and retain data on citizens and to force technology companies to hand over user data.
"My ability to communicate with people on the web, to go to websites I want without being spied on is really, really crucial."
The US government last year locked horns in a legal battle with Apple, seeking to compel the iPhone maker to help decrypt a device used by one of the attackers in the San Bernardino shooting rampage.