Normie messaging app versus email

Thank you all for the posts! Another harm reduction measure I thought of is assume Line is not E2EE and tell my friend to assume all messages can be accessed by Line Corporation, just like email. Normie messaging apps that claim E2EE cannot be trusted but I suspect message contents will likely be safer inside a normie messaging app than email. That said, I wonder what other information I would leak if I use Line and how to protect it. @Nostromo I suppose I could explain Signal to them and the diverse range of people who use it. I need to ask them why they declined to use Signal. But if they have a deal breaker reason for declining to use Signal then I won’t have much choice. There is the nuclear option, cutting ties, but I don’t want to consider that until I know there is no way forward. @WhyRhy Like you have found I didn’t describe a threat model. Basically I want as little about me and my communications (contents, metadata, telemetry) knowable to third parties as possible. My thinking is a bit like: assume Line is malicious enough to harvest as much data from all users as possible, how can it be used in the safest way possible? If I start using Line, I intend to do everything I can to deny Line’s access to such information. Further, the app is something that cannot be trusted or verified so I intend to keep it confined. I didn’t consider Proton/Tuta password protected email, thank you for proposing it, but in my experience this has never worked. In addition to clicking on a link and entering a password being too difficult/scary for many normies to handle, they either can’t access messages at all (browser issue perhaps?) or leak contents of messages when replying. I will propose it to my friend if we stay with email, and see what happens should we test it. @DailyChems Thank you for identifying some talking points that I may be able to use when explaining Signal. I have no reason to trust WhatsApp more than Line.