Transcript of Blockchain and Bitcoin : A Technical Overview
- 1. The views expressed in this presentation are Mere Apne.
Reference to any specific products, process ,or service do not
necessarily constitute or imply endorsement, recommendation, or
views of Min of Def or Govt All images used are for illustrative
purposes only & Do not promote any specific product
- 2. OVERVIEW WHY,HOW,WHERE WHOS WHO? TECHNOLOGY CASE STUDY JAI
HINDH SUMMARY
- 3. Paap se Dharti phati-phati-phati, Adharm se aasmaan,
Atyachaar se kaanpi Insaaniyat, Raj kar rahe Haivaan ... Jinki hogi
taqat apoorv, Jinka hoga nishana abhed, Joh karenge inka sarvanaash
... .woh kehlayenge Tridev
- 4. Name used by the unknown person or persons who designed
BITCOIN and created its original reference implementation SATOSHI
NAKAMOTO Kahan Gaya Usay Dhoondo
- 5. AS OF 10TH JUN 2017 1 BITCOIN IS WORTH 2907$ SO 1 BITCOIN IS
184951
- 6. ANONYMITY VS PSEUDONYMITY Mark TwainSamuel Clemens public
key addresses similar in function to an email address, are used to
send and receive Bitcoins and record transactions, as opposed to
personally identifying information.
- 7. CRYPTOCURRENCY IS AN ATTEMPT TO BRING BACK A DECENTRALISED
CURRENCY OF PEOPLE, ONE THAT IS NOT SUBJECT TO INFLATIONARY MOVES
BY A CENTRAL BANK
- 8. Bitcoin is starting to come into its own as a Digital
Currency, but the Blockchain Technology behind it could prove to be
much more SIGNIFICANT
- 9. BASICALLY CHUNKS OF INFO THAT CAN BE USED TO MATHEMATICAL
GUARANTEE ABOUT MESSAGES
- 10. Peer-to- Peer (P2P) network is created when two or more PCs
are connected & share resources without going through a
separate server computer
- 11. MERKLE TREE
- 12. Distributed Ledger is a Consensus of Replicated, Shared
& Synchronized digital data geographically spread across
multiple sites & countries
- 13. Type of Distributed Ledger, comprised of Unchangeable,
Digitally Recorded Data in packages called BLOCKS TAMPER EVIDENT
LEDGER
- 14. Linked list data structure, with each block containing a
hash of the previous block
- 15. Proof Of Work Is A Piece Of Data Which Is Difficult To
Produce But Easy For Others To Verify And Which Satisfies Certain
Requirements Bitcoin Uses The Hashcash Proof Of Work System.
- 16. Each block is formed by a proof-of- work algorithms,
through which consensus of this distributed system could be
obtained via the longest possible chain
- 17. Mining is the process of writing pages (blocks) of Bitcoin
transactions into the Bitcoin ledger, called The Bitcoin
Blockchain, and getting rewarded with newly created bitcoins
- 18. https://anders.com/blockchain/blockchain.html
- 19. Thus blockchain provides the basis for the TRUSTLESS
DISTRIBUTED SYSTEM
- 20. A block is an aggregated set of data Data is collected and
processed to fit in a block through a process called MINING Each
block could be identified using a Cryptographic Hash
- 21. Block will contain a hash of the previous block, so that
blocks can form a chain from the first block ever (known as the
Genesis Block) to the formed block
- 22. Every 10 minutes, all Bitcoin transactions taking place are
bundled into a block These blocks linked through a timestamp
signing, form a chain (blockchain), which goes back to the first
block ever created (mined) The time stamping makes it impossible to
alter any part of it once the network confirms it
- 23. These rules are inbuilt in the Bitcoin core software, which
every node in the Bitcoin network runs. Before a new block is added
to the blockchain, the Bitcoin network has to reach a consensus on
based on predetermined rules
- 24. Data in a blockchain is internally consistent and immutable
Each blocks hash is derived from the contents of the block Each
block refers to the previous blocks hash, not a sequential
number
- 25. THE LAST BITCOIN (PROBABLY 21 MILLIONTH COIN) WILL BE MINED
IN THE YEAR 2140
- 26. 206 , 1670 ... . SHA .
- 27. BITCOIN MINING
- 28. A user for CONDUCTING TRANSACTIONS utilizing BITCOIN, he or
she must first DOWNLOAD and setup a BITCOIN WALLET BITCOIN WALLET
can show the total BALANCE of all BITCOINS it CONTROLS and let A
USER PAY a specified AMOUNT
- 29. WALLET contains a USERS PRIVATE KEY, which ALLOWS FOR THE
SPENDING of the BITCOINS, which are located in the BLOCK CHAIN Once
wallet is INSTALLED & CONFIGURED, an ADDRESS is GENERATED which
is SIMILAR to an E-MAIL or PHYSICAL ADDRESS
- 30. WALLET is basically the Bitcoin Equivalent of a Bank
account. Allows to RECEIVE BITCOINS, STORE them, and then SEND them
to others
- 31. Connected to the Internet or is online is said to be HOT
Cold Wallets & Hot Wallets Cold is considered most Secure &
suitable for Storing Large Amounts of bitcoins Hot is suitable for
Frequently Accessed funds COLD implies it is Offline or
Disconnected from the Internet
- 32. Designedto be downloaded & used on Laptops/PCs
DESKTOPWALLETS Armory, Multibit, Msigna and Hiveto mention a FEW
Easyto Access. Available for Different OS Windows, Mac OS and
Ubuntu.
- 33. MOBILEWALLETS
- 34. ONLINEWEBWALLETS
- 35. PHYSICALWALLETS Once they are generated, you print them out
on a piece of paper Paper Wallets can Securely hold your BITCOINS
in Cold Storage form for a long time Bitaddress.org or
Blockchain.info
- 36. BitcoinQt is the First ever built bitcoin CLIENT WALLET
BITCOINCLIENTS WALLETS Original bitcoin wallet used by the Pioneers
of the currency COMPUTERS installed with these wallets FORM PART OF
THE CORE NETWORK & have access to all transactions on the
blockchain
- 37. HARDWAREWALLETS
- 38. BITCOIN ARTIFACTS
- 39. They DONT EXIST ANYWHERE, even on a hard drive
- 40. When we say SOMEONE HAS BITCOINS & you look at a
PARTICULAR BITCOIN ADDRESS, there are NO DIGITAL BITCOINS held
AGAINST that ADDRESS BALANCE of any BITCOIN address ISNT HELD at
that ADDRESS; one MUST RECONSTRUCT it by looking at the
BLOCKCHAIN
- 41. Everyone on the NETWORK knows about a TRANSACTION and THE
HISTORY OF A TRANSACTION can be TRACED BACK to the point where the
BITCOINS were produced
- 42. Conduct a SEARCH based on BLOCK NUMBER, ADDRESS, BLOCK
HASH, TRANSACTION HASH or PUBLIC KEY
- 43. BITCOIN-QT FOLDER STRUCTURE
- 44. BITCOIN-QT FOLDER STRUCTURE Blocks This subdirectory
contains blockchain data and contains a blk.dat file and a
blocks/index subdirectory. blk.dat stores actual Bitcoin blocks
dumped in raw format. The blocks/index subdirectory is a database
that contains metadata about all known blocks
- 45. Chainstate subdirectory- it is a database with a compact
representation of all currently unspent transactions and some
metadata about where the transactions originated BITCOIN-QT FOLDER
STRUCTURE
- 46. LOCK FILE DEBUG.LOG PEERS.DAT WALLET.DAT BITCOIN-QT FOLDER
STRUCTURE DB LOCK FILE EXTENSIVE LOGGING FILE PEER INFORMATION
STORAGE FOR KEYS,TXN,METADATA etc
- 47. Private key of the suspect, they can search for that
particular key on the Blockchain to Trace the purchases to other
potential Suspects. investigator has the Bitcoin
- 48. BITCOIN FORENSIC ARTIFACT EXAMINATION Windows 7
Professional Multibit Bitcoin-Qt Bitminter Basic USB ASIC Bitcoin
Gateway laptop ML6720 120 GB WD hard drive (4) USB ASIC Mining
drives USB powered cooling fan 32 GB USB thumb drive
- 49. Utilizing the data from 344 transactions, Meiklejohn able
to identify the owners of more than a million Bitcoin addresses
Sarah Meiklejohn, a Bitcoin focused Computer Researcher Extensive
Research in Bitcoin Blockchain Found that by looking blockchain an
investigator can uncover who owns a Bitcoin addresses
- 50. Bitcoin transactions occur via a Network Connection, an
investigator should seize any Physical Object that can connect to
the Internet in addition to the hard drive COLLECTION OF BITCOIN
ARTIFACTS
- 51. System Info Info about Logged users Registry Info Remnants
of Chats Web browsing Activities Recent Communications Info from
Cloud Services Decryption Keys for encrypted volumes mounted
COLLECTION OF BITCOIN ARTIFACTS
- 52. Ulbricht Ross
- 53. SMART CONTRACTS are computer protocols that facilitate,
verify, or enforce the negotiation or performance of a CONTRACT, or
that make a contractual clause unnecessary. Smart contracts often
EMULATE the logic of contractual clauses.
- 54. anupamtiwari@protonmail.com
https://about.me/anupam.tiwari