On iPhones and iPads there are several technologies available for monitoring and filtering network traffic. Filter network traffic from the Apple Deployment Guide has an overview of the technologies and their trade-offs.

Also delete your expired certificate if you have one (for example after a year)

This is likely a bad mistake. Keep the old cert around.

There’s two possibilities:

The first possibility is that Actalis uses the same key pair for the new cert. This is not a great approach because it doesn’t defend against a leaked key or key overuse. After all, if the key can be trusted longer than a year, the first cert they issued should be valid for longer.

The second, and much worse possibility, is that renewing the cert gets a different private key. This can case data loss. Deleting the old identity means you lose the ability to decrypt any messages that were encrypted using that key! Even if your mail client stores the previously encrypted emails in decrypted form, you may receive a new email from a sender who does not yet have your new cert.

Actalis sends you your private key. This means they have access to your private key, and theoretically could use it to sign and decrypt your emails. A more secure but somewhat more complex system would use a certificate signing request (CSR) instead. In that case, you are the only person who ever has your private key, so only you can sign or decrypt your email.

Releasing the app on the same day to the Apple App Store and Apple Arcade is a nice win for Apple Arcade.

An old favorite of mine is Harvest: Massive Encounter. Expand, harvest, defend, optimize, and eventually get wiped out.

It tells when the user is online. This is useful for sending spam, because being on top of the inbox makes it more likely your message will be read.

To be fair, I doubt anyone’s implemented this specifically for ICMP. Instead I’d expect tracking that watches for any IP traffic whatsoever, and that happens to include ICMP.

ICMP reveals your IP address, which is easily correlated with other traffic…

I still wouldn’t trust it because of homograph attacks.

Yeah. The huge legal distinctions between different ways of unlocking a device seem absurd. Comprehensive privacy legislation would help.

Authorities with a warrant can drill into a safe to get to its contents. That’s legally distinct from forcing someone to unlock the safe by entering the combination. It takes some mental effort to enter a combination, so it counts as “testimony”, and in the USA people can’t be forced to testify against themselves.

The parallel in US law is that people can be forced to unlock a phone using biometrics, but they can’t be forced to unlock a phone by entering a passcode. The absurd part here is that the actions have the same effect, but one of them can be compelled and the other cannot.

The downloadable shortcut described here also worked for me.

I assume you’re referring to Safari on iOS. I was able to select all on that Project Gutenberg page with a little-known scrolling trick:

1. Scroll to the bottom of the page. Yes, this part is a bit annoying but I was able to do that in 8 seconds with 25 full-screen flicks.
2. Long-press near the bottom of the page to start text selection.
3. Grab the bottom lollipop and drag it to the end of the page to select the last character.
4. Grab the top lollipop and drag it around a little to select more text. Don’t release it, and hold it still.
5. With a different finger, tap the status bar at the top of the screen. This is a shortcut for scrolling to the top of the page. Give it a couple seconds to finish scrolling. If you move the lollipop at all while it’s scrolling it will interrupt the scrolling, so keep that finger still until it’s done.
6. Now that you’re near the top of the page, drag the lollipop to the very top of the page and release it. The copy option should appear.

There’s no way to prove that something is secure. (It reduces to the halting problem.)

This is a terrible idea. It’s negligibly better than writing down the passwords, because it’s trivially easy to try every password represented on this card. Once someone has the card, your entropy is just two characters, which is the two characters you memorize for the site. In effect, you have a 2 character password.

I’d prefer a commander from Supreme Commander. It can raise an entire military by itself, and it’s much hardier than basic builders. It’s deadly up close. Even if you somehow defeat it, your reward is a nuclear explosion.