Date: Mon, 16 Sep 2019 14:54:03 -0400 From: notspam@...st To: oss-security@...ts.openwall.com Subject: Re: Telegram privacy fails again. >> There's no way to take this functionality seriously - the feature is a >> joke. A privacy feature centered around trusting another user's >> node to delete a file you already sent them is silly. Unfortunately, >> it seems like nobody gets this; even Matrix clients are supposed to >> have message redaction soon. > >It is still a useful feature as long as you don't consider it >"secure". In the immediate term, yes, it's easy to see potential benefits. In the long term, it will harm people. >If a user of the software took the "delete" claim at face value then it >could be considered security related .. Second line of the original email: "This is not a security vulnerability it’s a privacy issue." >and unlike Snapchat, the Telegram client *is* open source. The Telegram ecosystem is closed-source. Regardless, Telegram clients don't have to respect this setting, so the feature is a lie. The only way to enforce message deletion is through drm-like means (Snapchat...), which doesn't work anyway. That Telegram allows third-party clients only makes it worse, in a way.
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