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Text File | 1996-03-25 | 9.3 KB | 221 lines | [TEXT/MSWD] |
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- Burn
- A product of Next Wave Software, Inc.
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- Version 2.3 Users Manual
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- Privacy for Everyone
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- Released March 1996
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- About Burn
- No data security system would be complete without a way to destroy the
- original versions of a file after they are encrypted. Burn provides exactly
- that function. It is a drag-and-drop application under system 7. Files and
- folders dragged onto the Burn icon will be overwritten a user selected
- number of times with a user selected pattern, then renamed, then deleted.
- Both data and resource forks are deleted.
- A variety of options allow you to configure the application to exactly the
- ease of use and security you need. No matter what options you select, your
- trash will be far more secure than if you used Apple's built in trash
- capabilities.
- This application is not a replacement for the trash can. You should continue
- to drag unimportant documents and applications to the trash can. When you
- drag a file to the Burn icon it will be irretrievably deleted.
- System Requirements
- This application requires System 7, about 200k of disk space, and 400k of
- RAM. If you still use System 6 contact the author for a version compatible
- with your operating system.
- What's new in version 2.3
- Version 2.3 adds significant new features to Burn:
- • Asynchronous I/O increases erase times by nearly ten time and provides
- smoother performance to background applications. My thanks to Pete
- Resnick for some tips here.
- • Better Applescript support.
- • Improved erasure of filenames in addition to data.
- How to Destroy a File or Folder
- To destroy a file or folder simply drag the desired item to the Burn icon and
- release the mouse button. The item will be overwritten and deleted.
- You can also destroy a file or folder by double clicking on the Burn
- application and then selecting "Delete..." from the file menu. You will be
- prompted to select an item for destruction.
- Warning: Burn does not handle alias's the same way the trash icon in the
- Macintosh Finder does. If you drag an alias record to Burn (or open an
- alias from within the application) the ORIGINAL file will be destroyed, not
- the alias.
- Erasing Free Space on a Volume
- Burn allows you to erase the contents of the free sectors on your disks.
- This option is useful if you accidentally erased a sensitive file using the
- regular trash can, or if a file was deleted within an application. It is very
- safe because what it does is create a temporary file the size of the free space
- on your disk, and then burns that file. Thus there is no risk of Burn
- wandering off into parts of your hard disk that it should not venture (well
- almost no risk, see the next paragraph).
- Warning: Disks with a damaged directory can be further damaged if you
- Burn the free space. Be certain your disks are healthy by running a utility
- program such as Apple’s Disk First Aid before using Burn’s Erase Free
- Space command.
- To use this feature select "Erase Free Space..." from the file menu. It will
- prompt you to select a volume to clean. A status dialog will show the
- progress of the cleaning.
- For maximum security you should periodically select this option.
- Configuring the Application
- The “Preferences...” option under the file menu of Burn allows you to
- customize the behavior of Burn to suit how you use it. Below each option
- is described in detail.
- Confirm Deletes
- This option, if selected, will cause Burn to ask you to confirm the
- destruction of each file. It provides a “Delete All” button in the dialog box
- to bypass further confirmations if you are confident you know what you are
- doing.
- Display Status
- This option if selected will display a dialog box during destruction, showing
- the progress of the destruction. Burn will quickly destroy normal sized
- files, but you might want to select this option if you frequently burn large
- documents.
- Erase Patterns
- This pop-up menu lets you select the erase pattern Burn should use when
- overwriting files. If you are using only a single pass select all zeros or all
- ones for quick but good security. For maximum security you should
- probably select Random (and multiple passes).
- Erase Passes
- This pop-up menu lets you specify the number of erase passes Burn should
- make over the file while destroying it. For maximum security, select at least
- three. Anything over a single pass is serious overkill though unless you
- expect your hard disk to be in the NSA’s hands anytime soon.
- Scripting Burn
- The following screen shot from the Script Editor shows how you can script
- Burn:
- Scripting Burn
- The following screen shot from the Script Editor demonstrates how to script
- Burn:
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- Burn continues to respond to the Open Document apple event and is fully
- backwards compatible with any Burn 2.2 script you may have.
- Limitations
- There are a few things you need to be aware of using this or any file
- destruction utility.
- Burn does its best to destroy filenames along with files, however the
- Macintosh Operating System, probably for performance reasons, makes it
- difficult to destroy filenames with 100% certainty. This version of Burn
- seems to destroy the filename ninety percent of the time but it is not perfect.
- Do not assume Burn can reliably erase the name of a burned file. Other disk
- erase applications, including Norton Wipe Info and FlameFile have the
- same problem.
- You should be concerned if you have a file that significantly grows or
- shrinks in size (maybe a database file for instance.) There is no way for an
- application like Burn to know that some disk blocks used to be allocated to
- the file if it shrinks. Use the Erase Disk Free Space to minimize this
- problem.
- Recently deleted files are not always immediatly marked as free by the
- Macintosh Operating System, probably for performance reasons. This
- means that the Erase Free Space command may not destroy data from
- recently deleted files. Of course files erased with Burn are destroyed 100%
- of the time. Use a utility such as Norton Unerase to verify the files are
- truely destroyed or use Burn to erase free space a couple of times over a few
- days.
- If you are an Engineer with intimate knowledge of the Mac File Manager
- please contact me if you can be of assistance in the above problems. I’m
- looking for someone who has written File Manager code or equivalent (such
- as Norton Utilities).
- Troubleshooting
- I have no disk space free after using Burn’s Erase Free Disk
- Space option, what happened?
- Something caused Burn to be prematurely terminated. You will find a file
- in the root directory of the disk being cleaned equal in size to the missing
- disk space. This file should be deleted using the normal trash can and then
- repeat the Erase Free Space operation. The file’s name starts with the
- characters “MwBu” and after that is a long series of numbers.
- I pushed Burn into the background while erasing free space
- and I don’t have any disk space available, what happened?
- Burn temporarily grabs all available free space on a volume while its erasing
- it. With Burn in the background during such an operation you can’t do
- things that require additional disk space to be allocated. As soon as Burn
- completes its operation you will be able to create new files.
- I can’t drag files or folders to the application for deletion,
- what happened?
- You need to rebuild your desktop (this is a good idea to do regularly
- anyway). Reboot your computer and hold down the command and option
- keys until you get a message asking if you want to rebuild the desktop.
- Click okay.
- User Support
- I provide full support for Burn. Don't hesitate to send mail with questions,
- bug reports or suggestions. I want this program to be the best there is, and
- I want you to be a satisfied user.
- Standard Legal Stuff
- I am not responsible for any loss or damage due to any failure of this
- program regardless of the cause.
- Burn is © 1993-1996 by Michael Watson and Paul Jensen.
- Burn is a product of Next Wave Software, Inc.
- This program is not in the public domain. Next Wave Software, Inc.
- reserves all rights to this program.
- You are free to distribute this program to other users provided this
- documentation is enclosed. The program can not be offered for sale without
- my permission. Enclosure as part of a user group shareware collection is
- allowed so long as the collection is sold only to recover distribution costs.
- Any party desiring to include this program as part of a shareware collection
- that is sold on a for profit basis must receive written permission from the
- author.
- Contacting Next Wave Software
- Please note the new address and expanded internet presence for Next Wave
- Software.
- Questions can be mailed to:
- Next Wave Software, Inc.
- 7476 E. Arkansas Ave. #3306
- Denver, CO 80231
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- Next Wave Software on the Internet:
- World Wide Web: http://www.thenextwave.com/
- Internet: mdw@usa.net
- America On-Line: MikeW03
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- Appendix A
- What Was New
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- Version 2.2
- • Folders can now be deleted in their entirety using Burn. Simply drag a
- folder or folders to the Burn Icon (or select “Delete...” from the File
- Menu) every file in the folders will be irretrievably deleted.
- • Speed has been nearly doubled.
- • Preferences are now saved in the system folder instead of internally to
- the application which provides better network support and works more
- as the user would expect.
- • Burn can now be placed in the background while burning items.
- • Files are now deleted to their physical end of file instead of their logical
- end of file.
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- Burn 2.2
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