Understanding Bitcoin Transactions In this slide presentation, we will discuss the complex issue of a Bitcoin transaction. Bitcoins are exchanged and transferred digitally through a computer generated code. To ensure that these transactions are completed safely and securely users use keys. Two keys are always required for any transaction: 1. Public Key 2. Private Key The public key is the one that is used for the actual transfer of the Bitcoin. Because this key is public it allows anyone to verify the transaction. Before the transfer can take place the senders account is verified, this ensures that they have enough Bitcoins in their account to cover the transaction. Once this first verification is done the transaction enters into the Block Chain. Think of this as the public ledger displayed in a transparent glass layer. People can see but they can't touch it! This first verification step prevents anyone from trying to send the same transaction to two different people at the same time. If anyone attempts this type of process it is referred to as double spending. Having the two different keys prevents this from happening. The end user then uses their private key to unlock the transaction, once it has been verified. The Bitcoin then gets deposited into their Wallet. A wallet is simply an online bank account. Because the system uses two keys all activity in the network can be easily traced. The process of verification often occurs multiple times before the receiver deposits the Bitcoin. All of these transactions are available in the Block Chain, every transaction ever made is accounted for here. Plus anyone can view it if they wish to. How the Blockchain is Created Let's look at how the blockchain is created. As we described above it takes several verifications for each transaction to proceed. At this time the current number of verifications required is six. Before a transaction enters into the Blockchain a new block is formed first. The first step in this process is to verify that the person sending the Bitcoin has the currency available in their wallet. Now this is where it can get complicated, but we will try to keep it as simple as possible for you. To create a block, a process known as hash creation, has to occur. Think of this as small nodes that are attached to a block each time it is verified. So what happens is that the original block gets a little longer. As this is all done on via a mathematical software program zeros are added at the beginning of the block. As each new block, verification, is completed more zeros are added on. The largest block is always taken to be the authenticated block. Once this verification process has occurred six times this block enters into the BlockChain. As it enters a timestamp is associated with it. This is how you can easily see all the transactions that have ever occurred. No records are ever removed from the Blockchain and it will continue to grow in size

1. Author
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2.  Bitcoins are exchanged and
transferred digitally through a
computer generated code.
 To ensure that these
transactions are completed
safely and securely users use
keys.
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3.  Two keys are always required
for any transaction:
 1. Public Key
 2. Private Key
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4.  The public key is the one that
is used for the actual transfer
of the Bitcoin.
 This first verification step
prevents anyone from trying
to send the same transaction
to two different people at the
same time.
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5.  The end user then uses their
private key to unlock the
transaction, once it has been
verified.
 The Bitcoin then gets
deposited into their Wallet. A
wallet is simply an online bank
account.
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6.  Because the system uses two
keys all activity in the network
can be easily traced.
 The process of verification
often occurs multiple times
before the receiver deposits
the Bitcoin.
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7. How the Blockchain is
Created
 It takes several verifications
for each transaction to
proceed. At this time the
current number of
verifications required is six.
 Before a transaction enters
into the Blockchain a new
block is formed first.
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8. How the Blockchain is
Created
 To create a block a process
known as hash creation has
to occur.
 Think of this as small nodes
that are attached to a block
each time it is verified.
 The original block gets a little
longer.
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9. How the Blockchain is
Created
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 As this is all done on via a
mathematical software program
zeros are added at the
beginning of the block.
 As each new block, verification,
is completed more zeros are
added on.
 The largest block is always taken
to be the authenticated block.

10. How the Blockchain is
Created
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 Once this verification process
has occurred six times this
block enters into the
BlockChain.
 As it enters a timestamp is
associated with it.

11. How the Blockchain is
Created
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 No records are ever
removed from the
Blockchain and it will
continue to grow in size

12. WANT TO LEARN
MORE?
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