Why does the DOM single-origin policy take into account protocol and port? What if it was just domain?

I’m learning the basics of network security and am trying to really understand the single origin policy. I was wondering what the vulnerabilities would be if an origin was only defined by domain, as opposed to the normal trio of scheme, do… Continue reading Why does the DOM single-origin policy take into account protocol and port? What if it was just domain?

If browser cookies aren’t shared between different websites, then why is Same origin Policy useful?

I’m a beginner to Web security and I recently started reading about Same Origin Policy and it’s usefulness in preventing a malicious website from interacting with a secure website being used by a user. (For example, a bank website that a u… Continue reading If browser cookies aren’t shared between different websites, then why is Same origin Policy useful?

COOP and COEP: Is there an advantage to enabling COOP / COEP if I don’t need to use the sharedArrayBuffer or other features?

COOP: cross origin opener policy
COEP: Cross origin embedder policy
Most of the articles on the web, related to COOP / COEP, point to the fact that by enabling COOP / COEP , your web page can use the sharedArrayBuffer and some other precis… Continue reading COOP and COEP: Is there an advantage to enabling COOP / COEP if I don’t need to use the sharedArrayBuffer or other features?