I applaud the technical community rallying against the bill like this, but I fear that technical solutions are ultimately useless for this issue.

If the political climate stays the course, all the technical solutions for overcoming surveillance will eventually become marginalised and labelled as terrorist materials. Access will be blocked, anyone in possession may eventually face jail time.

AU customs is already searching the phones of people entering the country, it's not hard to imagine they might start denying entry to people with strong crypto capable apps like Signal.

I think this is a losing battle if it can't be fought at the legislation level...