When there's executable code there needs to be encryption. JS HTML CSS WASM etc ...all need to be tamper-resistant. Processing power, meh. More of an issue is

When there's executable code there needs to be encryption. JS HTML CSS WASM etc ...all need to be tamper-resistant. Processing power, meh. More of an issue is older devices not getting the updates to software for the newer algorithms, and not getting the updated certificates. I got rid of a perfectly good tablet for just this reason. A bit slow perhaps but workable.