Win 11 64 bit
I have some archives which have been encrypted, using the encrypt option either in pbs or when interactively creating a zip. When I open these, and look at files, I am asked for passwords, which I know, and then can view items or decrypt the files in the archive (tools>decrypt files).
However, when I use the Actions>Remove Archive Encryption (whether using the same zip or asking to write another), the routine shows progress bar to the end, but then just hangs i.e. “OK” never activates. All process information shows this stalled/hanging.
What can I do to sort this out?
Download this ZIP file: http://dslstats.me.uk/files/dslstats32W-6.5.zip
Everything in the ZIP file is in a directory “dslstats32W-6.5”.
However when I extract using right click “Extract Here” the name of the directory created is “2W-6.5” !
I am running PA 22.00.09 on Windows 11. I have seen the same happen with some other kinds of archive too.
If I compress a folder to a .pa using right click, Compress to folder.pa and use the new Windows 11 menu then the Options, Configuration, Miscellaneous, Use normal relative path setting is always enabled.
But I like this option disabled so I have to use the old style menu in order to get PA to compress a folder in the way I wish.
Just tried using the Modern (Windows 10) Icon set and seeing a few missing icons in both PowerArchiver Burner and PowerArchiver Encryption screens . They are all there in the Minimalistik icon set and the only difference I can see is the former is blue and the latter grey. In version 22.00.9
there were some security issues fixed in 7zip:
As it seems, that PowerArchiver and PACL use the 7zip libraries, could you please update them to the latest version?
I noticed that the version of ZPAQ used is older than the latest released 7.15 https://mattmahoney.net/dc/zpaq.html also there seems to be a newer fork that adds several features https://github.com/fcorbelli/zpaqfranz
It would be useful to implement this latest version (it also maintains the same syntax and behavior as the latest official release if used the -715 flag) and add when opening a zpaq file a choice of the version of the files to show (e.g. as dummy folders represented the various versions present). Since any previous changes are stored with this format, it is possible to extract a snapshot of a certain date/version.
If I open a password-protected zipper file (created with WinRAR but I think that’s irrelevant), open it with PowerArchiver and run “Remove Encryption” on the same file, then reopen it and add a password with “Encrypt Archive,” the resulting archive will be protected with the old ZipCrypto algorithm and not AES as indicated.
(this can be verified, for example, by trying to open the archive files with Windows Explorer, which does not support the AES algorithm)
Best way of archiving?
If I want to archive files, is there a rule which type of archive is most eficient for a certain type of file?
Which type of archive should I use for audio and video files?
Which type of archive should I use for .doc and .xls?
Which type of archive should I use for acrobat reader?
The answer definetelly depends on type of files. E.g. some files like MP3 audio files are already compressed (very similar compression to ZIP), so using ZIP definetelly is not propriate for compressing this format. Acrobate readed is also very well compressed, but usually there is something to save even when using ZIP format.
But I suggest you to compress multiple similar files at the same time and use either CAB or 7-ZIP compression. When compressing more than one similar files to same archive using some solid compression, you will get better results than compressing each file separatelly to same archive - CAB is solid by default, and 7-ZIP by option.
CAB is little bit slower, but realible solid compression. CAB files can be easily extracted by any archiver (or even now new installation of Windows XP).
7-ZIP provides much better compression ratio. Ratio and speed of compression depends on file type compressing, but usually with 7-ZIP you can get best ratio than with any other format. It is very good for all of three file types you have mentioned.
One of problems of 7-ZIP is that for extracting it you must have either PowerArchiver or 7-ZIP, but if you use this for your own purposes, then I suggest you to try with 7-ZIP.
If you are simply asking which gives the smallest archive file - then I agree with Ivan that 7Zip is usually the answer. However, when I did some sample testing I found that 7Zip was very bad on “compressed” formats such as Jpeg !!
Another consideration may be speed - 7Zip is by far the slowest compression method.
On “normal” filetypes:-
Cab gives the next best compression, usually much faster than 7Zip.
Tar with Bzip2 gives the next best compression, usually faster than Cab.
Note: in my testing 821 Wav files 15,281,041
Bzip2 - about 8 minutes (11.5MB)
Cab - about 25 minutes (11.9MB)
7Zip - nearly 2 hours (11MB)
PS for the Jpegs I tested 10 Files (12,600,516)
cab 7 minutes 12,564,597
bh 3 minutes 12,588,570
bz2 5 minutes 12,615,759 !.expansion.!
7z 45 minutes 12,664,029 !.expansion.!
I would recommend that you do a sample of your own files and judge for yourself.