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Updated FAQ

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2022-10-18 08:58:17 +02:00
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@@ -5010,13 +5010,18 @@ Password protected content is encrypted with [AES](https://en.wikipedia.org/wiki
with a 256 bits key derived with [PBKDF2](https://en.wikipedia.org/wiki/PBKDF2) / [SHA](https://en.wikipedia.org/wiki/Secure_Hash_Algorithms)-512 with 120,000 iterations.
With a sufficiently long/complex password, which is communicated to the recipient securely, this is considered safe in 2022 and for the foreseeable future.
The maximum content size is 1,500 bytes, which includes [HTML](https://en.wikipedia.org/wiki/HTML) formatting tags.
Images will be replaced with placeholders to reduce the content size, but other formatting, like bold, italic, etc., will be retained.
Due to [URL](https://en.wikipedia.org/wiki/URL) length limits, the maximum content size is 1,500 bytes,
which includes [HTML](https://en.wikipedia.org/wiki/HTML) formatting tags.
Images will be replaced with placeholders to reduce the content size, but other formatting, like bold, italic, links, etc., will be retained.
The content size limit is also why complete messages (possibly including a long reply chain) cannot be password protected.
You can use [PGP](https://en.wikipedia.org/wiki/Pretty_Good_Privacy) or [S/MIME](https://en.wikipedia.org/wiki/S/MIME) encryption for this (see [this FAQ](#user-content-faq12)).
[Cross-site scripting](https://en.wikipedia.org/wiki/Cross-site_scripting) is prevented by using [DOMPurify](https://github.com/cure53/DOMPurify) (Apache License Version 2.0).
This feature is available since version 1.1985, but only in the GitHub version of the app.
Protected content is only available in non-Play Store versions of the app (since version 1.1985).
Sending protected text is a pro feature, decrypting protected text is a free feature.
Sending protected content is a pro feature, decrypting protected content is a free feature.
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