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GitHub - eeeps/exif-intrinsic-sizing-explainer: An explainer for allowing images on the web to declare their own density and dimensions using EXIF metadata


Let’s say a page author has chosen to embed a variable-device-pixel-ratio responsive image, using
srcset. Like this:
No matter which resource the browser selects, the density-corrected intrinsic size of the
will always be the same: 300x200.
Here’s the equivalent client hints markup:

Let’s say a request for this
src goes out from a 2.6x device, with the following hint:
Sec-CH-DPR: 2.6
.but the server only has 1x, 2x, and 3x versions readily available. Reasonably, it responds with the 2x version, which includes the following EXIF headers, to ensure that the browser assigns the image a 2x intrinsic density and 300x200 intrinsic dimensions: ....

Same Origin Policy , அதே ஆரிஜிந் பாலிஸீ ,

CSRF, CORS, and HTTP Security headers Demystified


CSRF, CORS, and HTTP Security headers Demystified
mybank.com/transfer-funds.
Since you are logged in to
mybank.com, this request is made with your
mybank.com
cookies and will silently initiate a money transfer out of your account.
Since
mybank.com are different origins, the browser
refuses to provide the response to
evil.com (because of CORS), but the attacker doesn t
care, the money s already been transferred.
Now if
Each time
mybank.com serves a form to a user, it generates a CSRF token and inserts it into a
hidden field in the form
If a POST request is received, it checks the CSRF token against its database - if this is present and ....

Site Request Forgery , Origin Request Sharing , Single Origin Policy , Same Origin Policy , Site Scripting , Security Policy , Content Security Policy , Transport Security , Key Pinning , Download Options , தளம் கோரிக்கை மோசடி , அதே ஆரிஜிந் பாலிஸீ , தளம் ஸ்கிரிப்டிங் , பாதுகாப்பு பாலிஸீ , உள்ளடக்கம் பாதுகாப்பு பாலிஸீ , போக்குவரத்து பாதுகாப்பு , பதிவிறக்க Tamil விருப்பங்கள் ,

CSP & Magecart Web Skimmers: Facts and Fiction - Infosecurity Magazine


CSP & Magecart Web Skimmers: Facts and Fiction
With e-commerce displaying no signs of slowing down since the start of the COVID-19 pandemic, the Magecart cyber-criminal syndicate is thriving. By evolving their web skimmers to become harder to detect and avoid, they have been successful in breaching several high-profile businesses.
After years of discovery and research by the cybersecurity industry, we are at a stage now where companies have started looking for effective protection against this serious threat. Typically, when security teams understand how web skimming attacks operate and how they take advantage of the huge security blindspot that is the client-side, they first turn to CSP (Content Security Policy). ....

Michele Spagnuolo , Lukas Weichselbaum , Content Security Policy , Same Origin Policy , உள்ளடக்கம் பாதுகாப்பு பாலிஸீ , அதே ஆரிஜிந் பாலிஸீ ,

bugs.xdavidhu.me - xdavidhu's bug bounty writeups.


bugs.xdavidhu.me
(and more)
2019, October 11, 00:16:
I finish the cold frozen pizza that I made hours before but forgot to eat, finally write the report, press submit on the Google security bug submission form, and see the classic,
Thanks! We received your report. message. That feeling is hard to beat.
I just submitted a bug, using which, I could simply send a link to someone, and when they click on it and visit my website, I could
steal their YouTube watch history, the
links to watch all of their unlisted videos, their
Watch Later playlist, the list of
videos they’ve liked, and more. It was pretty damn cool. ....

Watch Later , Watch History , Liked Videos , Embedded Player , Same Origin Policy , Youtube Player , Stack Overflow , வாட்ச் பின்னர் , வாட்ச் வரலாறு , பதிக்கப்பட்ட ப்லேயர் , அதே ஆரிஜிந் பாலிஸீ , வலைஒளி ப்லேயர் , அடுக்கு ஓவர்‌ஃப்லோ ,

Front-End Performance Checklist 2021 — Smashing Magazine


Let’s make 2021… fast! An annual front-end performance checklist (available as PDF, Apple Pages, MS Word), with everything you need to know to create fast experiences on the web today, from metrics to tooling and front-end techniques. Updated since 2016. Ah, you can also get useful front-end tips in our email newsletter.
This guide has been kindly supported by our friends at LogRocket, a service that combines
frontend performance monitoring, session replay, and product analytics to help you build better customer experiences.
LogRocket tracks key metrics, incl. DOM complete, time to first byte, first input delay, client CPU and memory usage. Get a free trial of LogRocket today. ....

Apollo Graph , Firefox Devtools , Andrew Welch , Zach Leatherman , Georgy Marchuk , Tim Vereecke Frustrationindex , Tom Hanks , Robin Marx , Webpack Etsy , Nolan Lawson , Vuepress Vue , Barry Pollard , Wojciech Trocki , Dan Rublic , Patrick Hulce Thirdpartyweb , Lukas Bombach , Raja Rao , Katie Hempeniu , Yoav Weiss , Lydia Hallie , Paul Lewi , Jeremy Wagner , Eric Baer , Pat Meenan , Rawact Babel , Harry Robert ,