1. Private

2. Imagine... What would you want? Privacy! —NEXT—
Way back when, you may have sent a letter.
That would be in an envelope and you could quite safely assume that no one else would read that letter, as long as it was in an envelope.
rely on three things: legal guarantees, inconspicuousness and the cost of intercepting every letter.
These days, you’ll probably use . This is where it gets tricky. You don’t have the same legal guarantees and while you might assume your message is safe from prying eyes when it goes from A to B, you’d be wrong.

3. A Series of...
Your letter is passed from postman to postman, physically transported. This is a closed system.
No one makes a copy.
For this information to be intercepted, you have to steal a truck-load of post (and you can’t steal every truck), or force a postman to giving you some post.
difficult and expensive.
—NEXT—
Your travels through cables and computers administered and accessible by different organisations — ISPs, cable providers, Google, Yahoo, Hotmail and so on).
This means your could travel anywhere in the world without you even knowing. It’s out of your control.
As soon as you hit send, copies of your are created on computers throughout the world.
And they can stay on all of these computers forever.
What happens next is out of your control — who gets access to your from now on?
With access, it’s extremely easy and cheap to get copies of every that travels through a computer or cable.

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5. Encryption and decryption
Give padlock and key to someone (Bob) on other side of the room
Write a message on a post it, stick it in a box addressed to Bob.
demonstration — passing a message in an unlocked box, then locked (with destination, subject etc on the outside)…
everyone take a photo of it as it goes past
In the demonstration you may have noticed a bit of a problem. Somehow, I have to get Bob’s public key (open padlock) before sending them a message.
That works because I can see Bob .
In the virtual world, how do I know it’s really Bob?
He can’t it because then we’ll have the same problem.
There is a way to solve this problem. It means you have to trust a third party “key server” to handle key exchange.

6. Why? It’s getting easier. Revisiting why we care.
"The goal is to make eavesdropping expensive. That’s the way to think about this, is to force the NSA to abandon wholesale collection in favour of targeted collection of information.”
– Bruce Schneier (internationally renowned security guru)
Revisiting why we care.
Mass surveillance is bad.
Read out the quote!
It’s getting easier.

7. The New Software
Whiteout.io – Chrome app integrated with Gmail (alpha)
“Encryption for the rest of us”
ProtonMail
Google End-to-end
The traditional options are not user friendly. And require figuring out how to use key servers.
But now things are looking up — these new applications aim to make privacy easier.
Mailpile will be a good alternative but isn’t ready.
Whiteout is the easiest to get started with now.
If anyone asks:
GPGmail for OSX Mail
Enigmail for Thunderbird
GPG4win for Outlook
Chrome or Firefox extensions for Gmail web access e.g. Mailvelope

8. Get Started with Whiteout
Get the software
Follow the instructions to create a pair of keys
Encourage friends to repeat steps 1-2
Send encrypted s
Talk about what it’s doing in the background (sharing keys on a key server, automatically looking them up when you compose an )
Talk about levels of trust — Whiteout runs the key server
SCREENSHOTS
TODO: Check that whiteout does indeed encrypt the things