Other sources have mentioned it's just that she had a GPG public key she could give him as a result of her previous communication with people involved in Wikile

Other sources have mentioned it's just that she had a GPG public key she could give him as a result of her previous communication with people involved in Wikileaks. It's a real shame that even most investigative journalists—people especially likely to be targeted by the government and others—aren't properly encrypting their emails.