Downgrade encryption scheme and break integrity through known-plaintext attack
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The idea behind the Server Side Encryption is that you can move your encrypted files to an external party without that external party being able to to read or modify those files. Some time ago, Nextcloud switched from unauthenticated CFB cipher block mode to authenticated CTR cipher block mode in …
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阅读 HackerOne 原文 ↗作者 @weizenspreu · 版权归作者与 Nextcloud 所有