How sensitive are acoustic side-channels to compression with a narrowband codec?

Assume sensitive audio emissions from a mechanical keyboard. These audio emissions are often sufficient to reconstruct the actual key presses that generated the sound. If the audio is compressed using a narrowband audio codec such as G.711… Continue reading How sensitive are acoustic side-channels to compression with a narrowband codec?

Setting up VPN tunnel: what are the possible ways by which my true IP address could leak?

I bought a subscription to a VPN service and I set up the VPN tunnel using openvpn.
In order to avoid DNS leaks, I am using the DNS servers provided by my VPN provider by manually enforcing /etc/resolv.conf.
By navigating on the internet, … Continue reading Setting up VPN tunnel: what are the possible ways by which my true IP address could leak?

How do hackers take advantage of apps that are known to be leaking personal information?

I’m wondering how apps that leak personally identifiable information can be taken advantage of by hackers? How would they have the infrastructure to capture all that information that come from thousands of users?
I’m asking because when an… Continue reading How do hackers take advantage of apps that are known to be leaking personal information?

The v.Nu HTML validator program does not send anything over the network, does it? [closed]

I have finally found a HTML validator running on the command line, locally, which actually works and doesn’t want me to pay them money. It appears to work.
It’s this one, apparently made by W3: https://validator.github.io/validator/
Each t… Continue reading The v.Nu HTML validator program does not send anything over the network, does it? [closed]