by phpdevca
0 (0 reviews)
Unguessable Images
Replace default image filenames with unguessable random filenames
Tested up to WP 5.0.24 (Current: 6.9.1)
v1.0.0
Current Version v1.0.0
Updated 7 years ago
Last Update on 04 Jan, 2019
Refreshed 7 hours ago
Last Refreshed on
Rank
#49,523
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Active Installs
0+
-100%
KW Avg Position
N/A
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Downloads
883
+1 today
Support Resolved
0%
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Rating
0%
Review 0 out of 5
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Next Milestone 10
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10+
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- Version
- 1.0.0
- Last Updated
- Jan 04, 2019
- Requires WP
- 0+
- Tested Up To
- 5.0.24
- PHP Version
- N/A
- Author
- phpdevca
Support & Rating
- Rating
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- Reviews
- 0
- Support Threads
- 0
- Resolved
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Frequently Asked Questions
Common questions about Unguessable Images
A. Changes the filename of an uploaded image to include a random string of bytes, making it virtually impossible for an outsider to guess the URL of the image.
A. It matters if you have private content on your site that you only want to be available to visitors who know the URL of your image.
A. Yes they can, if the page is accessible to them. Therefore, in order to keep your images private you will have to ensure you never include them in public pages. However if you privately publish a page, then an attacker would need access to that page to find out the URL of the images used on it.
A. Yes the are. The point is that it would be virtually impossible for someone to guess the URLs to your images. However if the URL is provided to them by some other means, then they could still access the image once they know the URL.
A. Practically, yes. However, as with any probability, there is an infinitesimally small chance that an attacker could guess the URL of one of your images, but the chances are so tiny as to be negligible. To give you an idea, the default strength is 16 bytes. That means there are 340282370000000000000000000000000000000 possible combinations for an attacker to guess. If it was possible for them to try 1,000,000 times per second, and you had 1 million images on the site, they would still need 5,391,559,500,000,000,000 YEARS to have a 50% chance of stumbling across one of them.
A. No. What this plugin does is make it statistically impossible for someone to guess the URL of an image. However, as discussed above, if someone finds out the URL of an image by some other means, they can still access it. Therefore, we suggest if you really want to ensure your images cannot possibly be accessed, use some form of authentication (e.g. HTTP authentication) instead.
A. Using the random_bytes function in PHP. There is a less-secure fallback if you do not have this function, which was introduced in PHP 7.
A. You can increase or decrease the length of the generated string. You may also include characters from the original filename, and add a prefix or suffix.