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[Slashdot] - Study Shows Which Messengers Leak Your Data, Drain Your Battery, and More

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AmiMoJo writes: Link previews are a ubiquitous feature found in just about every chat and messaging app, and with good reason. They make online conversations easier by providing images and text associated with the file that's being linked. Unfortunately, they can also leak our sensitive data, consume our limited bandwidth, drain our batteries, and, in one case, expose links in chats that are supposed to be end-to-end encrypted. Among the worst offenders, according to research published on Monday, were messengers from Facebook, Instagram, LinkedIn, and Line. [...] Facebook Messenger and Instagram both downloaded a 2.6GB test file, as well as executing arbitrary Javascript code on their servers. When informed of this Facebook (which owns Instagram) said that was the intended behaviour, even though it could be used to e.g. hijack their servers for cryptocurrency mining. The three best messaging platforms were Signal, WhatsApp, Threema and iMessage, at least in terms of properly protecting your personal data.

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