7-zip could not open the zip file encrypted by SecureZip with password and contigency key(Encryption method: Recipient List or Passphrase)

[Richard Chen]

7-zip could not decrypt the zip file encrypted by SecureZip with password and contigency key(Encryption method: Recipient List or Passphrase). some companies will add contigency key to recover the zip file when there is a audit issue. Any plan to support it(Encryption method: Recipient List or Passphrase)?

[Igor Pavlov]

I don't know details about that method.
You can create some small example of such archive for me.
And I'll look it more.

Note that 7-Zip doesn't support some Pkware's "Strong" encryption methods. There is no open and detailed specification for some of these pkware's methods. So it's very difficult to support them.

[Richard Chen]

FYI
Here is the data-sheet of SecureZIP http://www.pkware.com/software/securezip/server/data-sheet
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Access encrypted files for audit and recovery purposes with contingency key*Files that have been encrypted must remain accessible to the organization. When files have been encrypted with PKI and/or passphrases, SecureZIP’s contingency key capabilities ensure that encrypted data is accessible for audit or data recovery purposes.
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I uploaded Test.zip(password=Zipreader123) and the screen dump for reference.