When I use SQLAlchemy with an external postgreSQL server, is the connection secured/encrypted?
from sqlalchemy.engine import create_engine
engine = create_engine('postgresql://scott:tiger@ip:5432/mydatabase')
Your connection string does not indicate secure connection. However, sometimes connection might be secure nevertheless, but it is unlikely.
To have a secure connection to PostgreSQL database you can use
engine = create_engine('postgresql://scott:tiger@ip:5432/mydatabase?sslmode=verify-full')
verify-full is the highest level SSL connection validation where the client performs full SSL certificate check for the connection.