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symmetric encryption with a block cipher using CBC-mode

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I have a question that is realted to symmetric encryption with a block cipher using CBC-mode, what is the consequence of: Using a predictable IV? and with Reusing an IV?

kelalaka avatar
in flag
Welcome to [cryptography.se]. With a little search, dupe 1 [Why is CBC with predictable IV considered insecure against chosen-plaintext attack?](https://crypto.stackexchange.com/q/3883/18298) dupe 2 [Does reusing IV in AES-CBC weaken it?](https://crypto.stackexchange.com/q/92078/18298). Unfortunately, you asked two different questions that needs a mode to close perfectly.
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