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fix typo in archiver

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Signed-off-by: Julien CLEMENT <julien.clement@epita.fr>
This commit is contained in:
Julien CLEMENT 2024-04-15 10:46:52 +02:00
parent af328857d7
commit 35e083d2d3
1 changed files with 3 additions and 5 deletions
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8
jujure/content/writeups/fcsc_2024/archiver.md
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@ -290,7 +290,7 @@ Remember that I know that filename is `flag.txt`, and that I have
an associated ciphertext.
With a little bit of luck, the IV of the filename cipher text
is generated with the key:
is generated with the same key:
```console
>>> 0x82 ^ ord('f')
@ -299,10 +299,8 @@ is generated with the key:
Looks like it does.
Since I have a known plaintext, example cipher text.
I can simply, xor the plaintext with the filename IV to recover
the xor key.
Since I have a known plaintext and example cipher text, I can simply, xor
the plaintext with the filename IV to recover the xor key.
Then apply the same key to the file data IV to recover the
plain text: