Show HN: Play rock paper scissors remotely over chat

Just came up with it. It needs weakness analysis though.

0. Alice creates alice.txt file with 'scissors' text in it

1. Alice zips alice.txt with password Apass as alice.zip

2. Alice sends alice.zip to Bob

3. Bob creates bob.txt file with 'paper' text in it

4. Bob zips bob.txt and alice.zip with password Bpass as bob.zip

5. Bob sends bob.zip back to Alice

6. They share their passwords over chat and unzip both zip files

7. Alice wins.