All Questions
Tagged with compression aes
7 questions
1
vote
1
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106
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Keystream reuse in AES-256 in AE-2 encrypted ZIPs
Is keystream reuse a meaningful concern in AES-256 encrypted ZIP files that adhere to the AE-2 spec? From “Attacking and Repairing the WinZip Encryption Scheme” by Tadayoshi Kohno
when using 256-bit ...
- 143
2
votes
1
answer
188
views
WinZip AE-2 for small files and AE-1 for larger - how small/how large for each?
I'm adding password protection/encryption support to a Python package that makes ZIP files (https://github.com/uktrade/stream-zip). I'm opting to not add ZipCrypto support, but instead add WinZip-...
- 143
4
votes
2
answers
2k
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AES-128 as compression function in Merkle-Damgard construction
Using a compression function $f : A × A → A$. A basic version
given by:
$W_0 = IV$
$W_1 = f(W_0, m_1)$
$W_2 = f(W_1, m_2)$
...
$W_n = f(W_{n-1}, m_n)$
$W_n$ is the output of the hash function, $...
- 71
1
vote
0
answers
79
views
Is it possible to recover password having ZIP/AES file and unpacked file?
Is it possible to recover password having ZIP/AES file and unpacked file?
Or unpack other files with the same password?
- 11
1
vote
0
answers
579
views
Compressing AES [duplicate]
I have this program which encrypts multiple files using AES then compress it using LZO into one single file. The problem is that the final file is almost equal in size than all the files which means ...
- 21
2
votes
1
answer
1k
views
Is it safe to use GZIP to avoid padding related attacks
I am designing a library that supports encrypting some in-memory data using AES in CBC mode. Now I need a padding but it seemed to me that Apple's CommonCrypto library and OpenSSL have different ...
- 558
79
votes
2
answers
187k
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What is safer: ZipCrypto or AES-256?
Like in title: which one of these encryption methods (ZipCrypto, AES-256) is more secure and why? I am asking about it because I'd like to know which should be preferred when compressing files with ...
- 901