Door 1

Beginner · New to crypto

Beginner. Kaspa is digital cash that does not need a bank. Miners spend energy so nobody can rewrite a payment for free. That is proof of work. This door names the parts, then tells you what they do not mean.

Start here

You do not need a course. You need a few words, one picture of a payment, and a place to try the rules without risking real money. That is this door, then the playground.

What this is

Ordinary money is an account at a company. They can freeze it, reverse it, or go down. Crypto, in the original sense, is a public ledger that anyone can check. You hold keys. You sign a payment. Miners spend electricity to propose the next records. Other computers check the work. Nobody in the middle has to approve you.

That energy is not decoration. It is the cost of lying about history. If rewriting the ledger were cheap, a thief could spend the same coins twice. Proof of work makes that expensive. Proof of stake replaced that cost with a vote of who already holds the coin. Kaspa did not take that turn. It is still proof of work.

Words you will see

Read these once. Come back if a later sentence uses them.

A payment in four beats

  1. You send. Your wallet signs. The payment is now a message on the network. Sending is not settling.
  2. It is included. A miner puts it in a block. Inclusion is not the same as “done.”
  3. It is accepted. The network’s agreed history now treats that payment as the spend. The old coins cannot be spent again.
  4. The recipient waits as they choose. A coffee and a house sale do not need the same wait. Kaspa does not pick that policy for them.

The playground slows this down so you can press the stages. Use it after this page, not instead of reading.

Where Kaspa sits

Bitcoin is the same idea: miners, keys, no premine as a fair-launch story. Bitcoin is a chain. When two honest miners find a block at the same time, one block is thrown away. Kaspa is a blockDAG. Honest parallel blocks stay. GHOSTDAG puts them in order. About ten blocks per second on mainnet today. That is a target rate, not a promise that your coffee is irreversible in a tenth of a second.

Most later coins sold speed by changing the security story: staking, a small set of validators, or a company sequencer. Kaspa’s bet is the opposite. Keep Bitcoin’s root. Make the ledger fast enough that payments and, later, spending rules can live on it without a second chain.

What still costs you

If you lose the keys, the coins are gone. If mining concentrates, a few operators matter more than the diagram suggests. Nodes still have to hear every block. Ten blocks per second is work for the network, not free throughput. Inclusion in a block is not the same as acceptance in the agreed history.

How to start without getting hurt

Door 2 is next if you already know Bitcoin or Ethereum and only need Kaspa placed. If you are still new, open Using KAS, then the playground.

Kaspa intel · Parker’s model

Two miners. Parallel blocks stay.

Bitcoin throws one honest block away. Kaspa keeps both and orders them. Inclusion is not acceptance. The recipient still chooses when a payment is settled.

Two miners. One network.
Two miners. Two independent blocks.

Miner 2 found C before hearing about B. Both blocks build on A.

Arrows reference earlier blocks.
A BLOCK earlier TRANSACTIONS Earlier block B BLOCK ref A TRANSACTIONS Miner 1 · 100 ms C BLOCK ref A TRANSACTIONS Miner 2 · 400 ms A BLOCK earlier TRANSACTIONS Earlier block B BLOCK ref A TRANSACTIONS Miner 1100 ms C BLOCK ref A TRANSACTIONS Miner 2400 ms
Inspect the timing
Adjust the delay and inspect a block

An illustrative two-miner model. Discoveries stay fixed at 100 and 400 ms. The same delay applies both ways. Packet positions show elapsed delivery, not physical distance.

Model assumptions and event times

Delivery occurs before discovery at an exact tie. Real mining is random. D is a possible later block, not a timed discovery. This example calculates neither GHOSTDAG nor confirmation confidence.

TimeEvent
0 msBoth miners know A.
100 msMiner 1 finds B, referencing A.
400 msMiner 2 finds C, referencing A.
600 msMiner 2 receives B.
900 msMiner 1 receives C.

A payment through the network

A payment through the networkIllustrated sequence
Sender
Signed paymentPermission to spend an output
Network
Block
Your payment
Other transactions
Recipient
AcceptedA spendable outputIn the currently accepted history
The payment is accepted in the current history. The recipient may still wait before treating it as settled.

This sequence has no clock or confirmation count. Inclusion, acceptance, and a recipient’s confidence are different things.

Optional film · Kaspa Silver
Kaspa Silver: what Kaspa is.

Explore from here

Learn on the models. See the live DAG. Try a spend only if you brought test coins.

Kaspa Graph Inspector

The live blockDAG. This is the picture. The rest of the door is text.

Open kgi.kaspad.net
If the frame is blank, the inspector blocked embedding. If the picture stops, treat it as paused, not as a failed network. The link still works.

I am… these people land on this door.

New to cryptoOther

Continue

The playground is the mechanics. These pages are the next lesson and the extra reading.

Try it

Same for every door.

Back to the four doors