# HG changeset patch # User David Barts # Date 1587095380 25200 # Node ID 0161374f7a60486bdc791a127416288452830539 # Parent 75f01ae83929f59491a9884d5b2672d5a3d6f3a6 Update Readme.html. diff -r 75f01ae83929 -r 0161374f7a60 Readme.html --- a/Readme.html Thu Apr 16 20:16:33 2020 -0700 +++ b/Readme.html Thu Apr 16 20:49:40 2020 -0700 @@ -10,7 +10,7 @@ -

Indroducing ExifWasher

Introducing JpegWasher

Executive Summary

This program makes it easy to remove metadata from the digital images you create.

@@ -26,15 +26,15 @@ instrumental in helping to motivate social change.

Because of the metadata they contain, digital photographs contain data which has been used to determine who took them, and in some cases to exact - retribution against their photographers. ExifWasher makes it easy to see + retribution against those photographers. JpegWasher makes it easy to see and remove the privacy-compromising metadata in your images.

Even if your images are not of such a sensitive nature, that extra data takes up space. It is not uncommon for a 100 KiB image to contain 20 KiB of metadata in it; if that image is on a web page, that makes for 20 KiB of wasted network usage each time the image is sent.

What Makes ExifWasher Different from Other Metadata Editors?

What Makes JpegWasher Different from Other Metadata Editors?

Simply put, it is designed to safely remove unimportant - metadata.

+ metadata from JPEG files.

There are plenty of general-purpose image metadata editors out there, and these tools can be employed to remove unimportant metadata. The trouble is, they are not user-friendly: it is up to you, the user, to know which @@ -51,42 +51,53 @@ display improperly. Also of concern, many of these “tools” are actually online services. If you’re concerned about your privacy, why would you trust the images you’re processing to some unknown third party, who may be - linked somehow to those who might want to retaliate against you.

+ linked somehow to those who might want to retaliate against you?

I wrote this program because I wanted there to be a quick, easy way to scrub images before they even left a photographer’s computer and made their way onto the Internet, and for that program to leave vital metadata alone, so that the resulting images continue to display properly.

ExifWasher Washes More than Just Exif Metadata

Exif is the most common type of metadata, but image files commonly +

JpegWasher Washes More than Just Exif Metadata

Jpeg is the most common type of metadata, but image files commonly contain compromising XMP or IPTC data, particularly if they have been - edited with a tool like Photoshop. ExifWasher will seamlessly deal with + edited with a tool like Photoshop. JpegWasher will seamlessly deal with these kinds of metadata, too. It tries to do as thorough a job as possible of scrubbing possibly compromising metadata from your images.

Using ExifWasher

Just double-click on the ExifWasher icon and a main window should open +

Using JpegWasher

Just double-click on the JpegWasher icon and a main window should open up. Either choose the File… Wash from the menu bar, or just drag image - files onto the main ExifWasher image.

When ExifWasher opens an image, it displays all the metadata it finds. + files onto the main JpegWasher image.

When JpegWasher opens an image, it displays all the metadata it finds. That metadata will be run through an internal whitelist, and any data whose “key” is not found on the whitelist will be automatically selected for deletion.

If you disagree with ExifWasher’s decisions, you can check or uncheck the +

If you disagree with JpegWasher’s decisions, you can check or uncheck the boxes next to the metadata in question. When you are satisfied with the choice of metadata to be scrubbed, click “Wash” and all offending metadata will be removed. A dialog will pop up showing the metadata remaining in the new, washed file.

Important: Run ExifWasher Last!

Important: Run JpegWasher Last!

Most image-editing tools insert telltale bits of metadata into the output they create. Thus, only way you can create a file with the minimum amount - of metadata in it is to run ExifWasher as the final step in your image + of metadata in it is to run JpegWasher as the final step in your image preparation.

Washing Non-JPEG Images

In short: it’s possible, but it is not recommended unless you really + know what you’re doing.

JpegWasher is called JpegWasher for a reason: it is geared to cleaning + metadata in JPEG files. Different types of images use metadata + differently; metadata that would be extraneous deadwood in a JPEG can be + critical to interpreting other image file formats correctly. JpegWasher’s + built-in whitelist is geared to what must be retained when washing JPEG + images, so careless use of JpegWasher is likely to damage non-JPEG + files. It is for this reason that JpegWasher will warn you if you + attempt to open and wash a non-JPEG file with it.

Output Files

ExifWasher never modifies an existing image file. Instead, it creates a +

JpegWasher never modifies an existing image file. Instead, it creates a new file of the same type but with “_washed” appended to its name. For example, processing foo.jpg will create foo_washed.jpg. By default, the new file will be created in the same directory as the file being washed.

ExifWasher is Configurable

JpegWasher is Configurable

Both the whitelist and the destination directory for the washed files are user-configurable in the Preferences menu.

Configuring the Whitelist

@@ -95,14 +106,14 @@ asterisk. The whitelist is case-sensitive; i.e. the entry exif.image.colormap will not match the Exif.Image.ColorMap key.

That’s about It

ExifWasher does not, and probably never will, do anything but remove - extraneous metadata.

JpegWasher does not, and probably never will, do anything but remove + extraneous metadata from JPEG files.

First, I have no desire to re-invent the wheel. There are already excellent open-source tools like Gimp for image editing, and ExifTool and - Exiv2 for general-purpose metadata editing (in fact, ExifWasher is built + Exiv2 for general-purpose metadata editing (in fact, JpegWasher is built on top of Exiv2). If you need the functionality of some other tool, download and use it!

Second (and more importantly), I want ExifWasher to be simple, and +

Second (and more importantly), I want JpegWasher to be simple, and therefore easy to learn and easy to use. The more challenging an information-security tool is to use, the less likely it is to be used frequently, and the more likely it is that compromising information gets