My employer is changing my contract from a 1099 to a W-2 because my contract has lasted longer than the small project I was first hired for. Because of this, my employer wants me to send my bank account number over email because they lost my previous details (I was first hired ~1.5 years ago). I would be happy to send it over, but in the email he included my routing number so I would know what bank account number to send over. I'm pretty skeptical when it comes to security, and I don't want my bank account number and routing number to be in the same place, should mine or their email get hacked.
What are my options here?