So the goal of steganography is to transmit a message from A

to B without being noticed.

So the goal of steganography is to transmit a message from A

to B.

So A is oftentimes referred to as Alice,

like in these cryptographic literature, to B, B as Bob,

without being noticed by a powerful warden.

And the name of that warden is Wendy.

So why warden?

There's this prisoners analogy, like A and B sit in a prison

cell, each every both.

And they can do in their cell what they want,

but they actually need to coordinate the prison break.

So they send messages to each other.

And between these cells, there's this Wendy.

And she's looking at everything that goes in and out.

And she's really thorough.

And she's backed by a nation state or so

with infinite resources to look through everything.

So the question is, OK, how can Alice and Bob get

some covert communication going?

Like they may exchange stuff, like magazines and so on.

That's all no problem.

But they may not exchange their flight plans.

And so how can they transmit these flight plans

within cover material?

And yeah.

What is stick analysis?

Stick analysis, that is what Wendy is doing.

So the goal of stick analysis is to tell whether a communication

process contains a concealed message.

So stick anographic message.

So if you wonder where these words come from, that's Greek.

Stick analysis is secret.

And graphene is writing.

And analysis, OK, is like this.

Analysis, OK.

So you can write this down if you like.

Stick analysis is secret or covert or hidden.

And graphene is to write.

So you can imagine it's a topic that was always interesting

to people, but particularly in a setting where there are really

powers clashing onto each other.

So for private businesses or so, it's not so much of a deal.

Because you need to have an adversary that

is powerful enough to make this problem interesting.

If you don't have a powerful adversary, it's boring.

So what can Wendy be?

Wendy can be, for example, an army besieging a city.

And you like to get messages out or so.