Re: Get that encryption outta here!
The real vulnerability is using a "secure" messaging platform that wasn't developed by security experts or cryptographers. LINE's code is "not consistent with well-known cryptography engineering best practices".
There's been a proliferation of OTT messaging platforms that make all sorts of security claims. As we saw with the Zoom "end-to-end" scandal and other cases, those claims are often rubbish, and even when they're accurate in themselves, they paper over a wealth of other vulnerabilities which make them largely irrelevant.