How to read & write standard password encrypted ZIP files?

[Robert]

Is it possible to write & read standard password encrypted ZIP files
easily (using zipfile.ZipFile?)

Robert

 

[Josiah Carlson]

Is it possible to write & read standard password encrypted ZIP files

easily (using zipfile.ZipFile?)

It may be supported via some undocumented method.

One thing you should be aware of, is that ZIP files have a known
cryptographic attack for >= 3 files encrypted with the same password in
a zip file. When there are more than 3 files in a zip file, all
encrypted with the same password, only 15 bits of the password is
required to decrypt the archive, then (I believe) recover the original
password.

Generally, you would be better off using Python to create the original
archive (without encryption), then use some encryption method to secure
it. I hear that mxCrypto is a very spiffy library for Python cryptography.

- Josiah

 

[Robert]

Is it possible to write & read standard password encrypted ZIP files

It may be supported via some undocumented method.

any more information on that?

One thing you should be aware of, is that ZIP files have a known
cryptographic attack for >= 3 files encrypted with the same password in
a zip file. When there are more than 3 files in a zip file, all
encrypted with the same password, only 15 bits of the password is
required to decrypt the archive, then (I believe) recover the original
password.

Generally, you would be better off using Python to create the original
archive (without encryption), then use some encryption method to secure
it. I hear that mxCrypto is a very spiffy library for Python cryptography.

is there a secure encrypted format, that could be read also by common
tools like WinZIP, WinRAR ?

Robert

 

[Paul Rubin]

is there a secure encrypted format, that could be read also by common
tools like WinZIP, WinRAR ?

There's a proposal for better encryption in zip files, but I don't
think it's widely supported yet.