At EFF we’ve long noted that you cannot build a backdoor that only lets in good guys and not bad guys. Over the weekend, we saw another example of this: The Wall Street Journal reported on a major breach of U.S. telecom systems attributed to a sophisticated Chinese-government backed hacking group dubbed Salt Typhoon. According to reports, the hack took advantage of systems built by ISPs like Verizon, AT&T, and Lumen Technologies (formerly CenturyLink) to give law enforcement and intelligence agencies access to the ISPs’ user data. This gave China unprecedented access to data related to U.S. government requests to these major telecommunications companies. It’s still unclear how much communication and internet traffic, and related to whom, Salt Typhoon accessed. That’s right: the path for law enforcement access set up by these companies was apparently compromised and used by China-backed hackers. That path was likely created to facilitate smooth compliance with wrong-headed laws like CALEA, which require telecommunications companies to facilitate “lawful intercepts”—in other words, wiretaps and other orders by law enforcement and national security agencies. While this is a terrible outcome for user privacy, and for U.S. government intelligence and law enforcement, it is not surprising.  The idea that only authorized government agencies would ever use these channels for acquiring user data was always risky and flawed. We’ve seen this before: in a[…]