Questions about misuse vulnerabilities

Hi

2 separate questions:

1.  I've read that you are not supposed to use the same gpg key on different loop-aes volumes.  Why?  Even if the volumes contains some (but not all)  data in common, how does that help an attacker?

2. How long in bytes does a known plaintext string encrypted at a known position on a v3.x loop-aes encrypted device have to be to allow an attacker to reverse engineer what the v3.x plaintext multiline key must be?

Thanks


      

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Linux-crypto:  cryptography in and on the Linux system
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