John Navas wrote:
[.]

> There are two different security issues:
>
> 1. Wireless security. His laptop might well have high security, but
> when you give him your key, there's a risk that he might inadvertently
> give it to someone else. There are a number of ways to deal with this:
>
> (a) Change your passphrase after he leaves. This is the least you
> should do.

BTW, what I'll type it in for him instead of giving it to him. I'll
definitely change after he leaves.