What if the government decided that you can use E2E encryption, but only using encryption protocols they are capable of cracking? Like, you could only use DES

What if the government decided that you can use E2E encryption, but only using encryption protocols they are capable of cracking? Like, you could only use DES for your E2E encryption. That'd be similar to how gun control is now; you're allowed to have them, but only if the government approves them. If you need stronger than DES, you have to send in an application to the federal government, just like people who want automatic weapons or suppressors.