Social media companies such as Facebook face a controversial EU privacy crackdown that would prevent them from reading private messages sent between individuals.
The so-called "ePrivacy" regulations, currently being debated in Brussels, are designed to hand citizens extra privacy protections against internet companies.
However, industry bodies have slammed the proposals as "unreasonable" and potentially "careless", claiming they will impose a huge burden on technology companies of all sizes.
A letter to the European Council signed by 57 technology and internet groups, including techUK, the European Tech Alliance and the Washington-based Information Technology Industry Council, warns of a "considerable negative impact" that will "extend to all sectors of the EU digital economy".
It warns that the proposed regulations are overly strict and will prevent legitimate data processing, even when there is little risk of a person's privacy being breached.