These are ---->>> Electronic Signatures Infrastructures - Building blocks and XAdES baseline signatures - electronic signature, security, XAdES, XML

Bitcoin: A Peer-to-Peer Electronic Cash System
Satoshi Nakamoto
satoshin@gmx.com
www.bitcoin.org
Satoshi white paper

chapter 2 Transactions : the previous owners did not sign any earlier
transactions .

chapter 3 ----->>> 3. Timestamp Server : The timestamp proves that the data must have existed at the
time, obviously, in order to get into the hash. Each timestamp includes the previous timestamp in
its hash, forming a chain, with each additional timestamp reinforcing the ones before it.

chapter 4 Proof-of-Work : The proof-of-work involves scanning for a value that when hashed, such as with SHA-256, the
hash begins with a number of zero bits. The average work required is exponential in the number
of zero bits required and can be verified by executing a single hash.

chapter 5 Network :
1) New transactions are broadcast to all nodes.
2) Each node collects new transactions into a block.
3) Each node works on finding a difficult proof-of-work for its block.
4) When a node finds a proof-of-work, it broadcasts the block to all nodes.
5) Nodes accept the block only if all transactions in it are valid and not already spent.
6) Nodes express their acceptance of the block by working on creating the next block in the
chain, using the hash of the accepted block as the previous hash.

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What i have from all these ?!

As mentioned above ----->>> Signatures x509 certificates - Tokens - time stamp - hash file - private keys

wiki  x509 certificates - For information i have version 1
https://en.wikipedia.org/wiki/X.509

How look like private key i have ?!
As mentioned above ---> 64 size A-F - 0-9

and here the wiki private key look like E9873D79C6D87DC0FB6A5778633389F4453213303DA61F20BD67FC233AA33262
https://en.bitcoin.it/wiki/Private_key