Blockchain: Build, Secure and Deploy Real-World Applications

Learn blockchain from fundamentals to smart contracts, security, Hyperledger, real-world applications across industries.

What you'll learn
- Explain the fundamental concepts of blockchain including distributed ledgers, consensus mechanisms, and cryptographic principles.
- Differentiate between types of blockchains (public, private, consortium, hybrid) and identify their use cases.
- Describe the architecture of Bitcoin and understand how transactions, wallets, mining, and forks operate.
- Compare Ethereum and Bitcoin, and explain the role of smart contracts, DApps, and gas fees in the Ethereum ecosystem.
- Write, deploy, and test smart contracts in Solidity using Remix, Ganache, and the Ethereum Virtual Machine (EVM).
- Evaluate security vulnerabilities in smart contracts (e.g., reentrancy, integer overflow) and apply mitigation techniques.
- Understand the design and architecture of Hyperledger Fabric and contrast permissioned vs. permissionless blockchains.
- Explore interoperability solutions such as Polkadot and Cosmos, and explain how different blockchain networks communicate.
- Analyze emerging trends such as Decentralized Finance (DeFi), Layer-2 scaling, and AI-blockchain integration.
- Assess blockchain security threats (51% attacks, Sybil attacks, eclipse attacks) and apply strategies for mitigation.
- Implement cryptographic techniques such as RSA signing, hashing, and zero-knowledge proofs in blockchain contexts.
- Build a simple blockchain prototype in Python, including block creation, proof-of-work, and transaction recording.
- Develop blockchain-based applications in various domains such as voting, land registry, healthcare, supply chain, and identity management.
- Apply decentralized identity and confidential transactions concepts to real-world scenarios.
- Critically evaluate regulatory and legal challenges associated with cryptocurrencies and blockchain adoption in enterprises.

Requirements
- Enthusiasm and determination to make your mark on the world!

Description
A warm welcome to theBlockchain Masterclass: Build, Secure, and Deploy Real-World Blockchain Applicationscourse byUplatz.

Blockchainis adistributed ledger technology (DLT)that records transactions across a network of computers in a secure, transparent, and tamper-resistant way.

Instead of storing data in a single central database, blockchain distributes identical copies of the ledger across all participants (called nodes). Every new transaction is validated by the network and grouped into blocks, which are then linked together in chronological order—forming a chain of blocks, hence the nameblockchain.

How Blockchain Works

Transaction Initiation

A user requests a transaction (for example, sending cryptocurrency, recording a contract, or logging supply chain data).

Transaction Broadcast

The transaction is broadcast to a network of computers (nodes).

Validation

Nodes validate the transaction using aconsensus mechanismsuch as Proof of Work (PoW) or Proof of Stake (PoS).

This ensures the transaction is legitimate and prevents fraud or double-spending.

Block Creation

Validated transactions are grouped together into a block.

Each block contains:

A list of transactions

A timestamp

A cryptographic hash of the previous block (linking it securely in the chain)

Adding to the Chain

Once verified, the new block is added to the existing chain of blocks.

Because every block links to the previous one, altering data in a block would break the chain, making it extremely tamper-resistant.

Distributed Ledger Update

The updated blockchain is replicated across all nodes in the network.

Every participant now has the same trusted copy of the ledger.

Key Features of Blockchain

Decentralization– No single central authority; control is distributed.

Transparency– All participants share the same ledger and can view transactions.

Immutability– Once data is recorded, it cannot easily be altered.

Security– Cryptography protects data integrity and user identities.

Consensus Mechanisms– Ensure agreement on valid transactions.

Example in Practice

Imagine Alice sends 1 Bitcoin to Bob:

The transaction request is broadcast to the network.

Nodes validate Alice has enough balance.

The transaction is grouped with others into a block.

The block is validated and added to the blockchain.

Bob receives 1 Bitcoin, and the ledger is updated across the network.

Blockchain Masterclass: Build, Secure, and Deploy Real-World Blockchain Applications - Course Curriculum

Topic 1: Blockchain Fundamentals

Session 1– Overview of Blockchain

Session 2– Types of Blockchain – Public, Private, Consortium, Hybrid

Session 3– Distributed Ledger Technology (DLT) and Hashing

Session 4– Consensus Mechanisms – POW, POS, Delegated POS, Byzantine Fault Tolerance

Session 5– Cryptographic Principles – Hash Functions, Digital Signatures, Encryption

Topic 2: Bitcoin and Early Blockchain Systems

Session 6– Bitcoin Architecture and Protocol

Session 7– Mining and the Role of Miners

Session 8– Bitcoin Transactions and Wallets

Session 9– Blockchain Forks – Hard Forks and Soft Forks

Topic 3: Ethereum and Smart Contracts

Session 10– Ethereum vs Bitcoin – Smart Contracts and DApps

Session 11– Other Cryptocurrencies (Litecoin, Ripple, Monero, etc.)

Session 12– Regulatory Challenges and Legal Aspects of Cryptocurrencies

Session 13– Introduction to Smart Contracts

Session 14– Ethereum Virtual Machine (EVM) and Solidity PART-1

Session 15– Ethereum Virtual Machine (EVM) and Solidity PART-2

Session 16– Writing a Simple Smart Contract in Solidity

Session 17– Deploying Smart Contracts Using Remix and Ganache

Session 18– Ethereum Gas and Transaction Fees

Session 19– Security Concerns in Smart Contracts (Reentrancy, Overflow, etc.)

Topic 4: Enterprise Blockchain (Hyperledger & Permissioned Chains)

Session 20– Hyperledger Fabric – Introduction and Architecture

Session 21– Consensus in Hyperledger and Practical Byzantine Fault Tolerance (PBFT)

Session 22– Permissioned vs. Permissionless Blockchains

Session 23– Interoperability of Blockchain Networks (Polkadot, Cosmos, etc.)

Topic 5: Emerging Trends in Blockchain

Session 24– Decentralized Finance (DeFi) & Yield Farming

Session 25– Layer-1 vs Layer-2 Scaling Solutions (Lightning Network, Rollups, Sidechains)

Session 26– Blockchain and Artificial Intelligence (AI) Integration

Topic 6: Blockchain Security & Privacy

Session 27– 51 Percent Attack, Sybil Attack, Eclipse Attack

Session 28– Security Mechanisms and Threat Mitigation in Blockchain

Session 29– Zero-Knowledge Proofs and zk-SNARKs

Session 30– Private Blockchains and Confidential Transactions

Session 31– Decentralized Identity and Self-Sovereign Identity

Session 32– Practical RSA Document Signing using Private Key

Topic 7: Blockchain Development with Python

Session 33– Block Creation and Hash Linking in Python to Create a Simple Blockchain Structure

Session 34– Block Creation with SHA-256 Hashing

Session 35– Prototype Implementation of a Linked Blockchain Ledger with SHA-256

Session 36– Blockchain with Proof-of-Work (PoW) in Python

Session 37– Recording a Transaction in a Block Using Python

Session 38– Blockchain with Transactions and Mining

Topic 8: Blockchain Applications – Prototypes

Session 39– Voting System Based on Blockchain

Session 40– Blockchain-Based Escrow Transaction System Using Python

Session 41– Blockchain-Based Land Registry System

Session 42– Blockchain-Based Certificate Verification System

Session 43– Blockchain-Based Medical Record System

Session 44– Blockchain-Based Simple Banking Ledger

Session 45– Blockchain-Based Supply Chain Tracker

Session 46– Blockchain-Based Digital Identity Management

Session 47– Blockchain-Based Academic Transcript Management

Session 48– Blockchain-Based Advanced Healthcare Record System

Session 49– Blockchain-Based Skill Certificate Authentication System

Session 50– Blockchain-Based Vehicle Ownership History System

Session 51– Blockchain-Based Public Grievance Redressal System

Session 52– Blockchain-Based NGO Donation Tracking System

Session 53– Blockchain-Based Product Warranty System

Session 54– Blockchain-Based Loyalty Points and Rewards System

Session 55– Blockchain-Based Book Ownership Registry

Session 56– Blockchain-Based Artwork Provenance Tracker

Session 57– Blockchain-Based Package Delivery Tracker

Session 58– Blockchain-Based Expense Recording and Verification System

Who this course is for:
- Aspiring Blockchain Developers – beginners and programmers who want to build blockchain-based applications and smart contracts.
- Software Engineers and Web Developers – looking to expand into decentralized app (DApp) development with Ethereum and Solidity.
- Data Scientists and Python Developers – interested in hands-on blockchain implementation and cryptographic concepts.
- Enterprise IT Professionals and Architects – who want to understand blockchain platforms like Hyperledger for business use cases.
- FinTech and DeFi Enthusiasts – keen to learn how blockchain underpins cryptocurrencies, decentralized finance, and yield farming.
- Security Professionals – aiming to understand blockchain attacks, defenses, and cryptographic security mechanisms.
- Students and Graduates – in computer science, IT, or finance who want to gain future-ready skills in blockchain technologies.
- Entrepreneurs and Product Managers – exploring blockchain’s potential for real-world applications such as supply chain, healthcare, and identity management.
- Technology Consultants and Freelancers – who want to advise clients on blockchain adoption and implementation.
- Anyone Curious About Blockchain – professionals or hobbyists eager to understand how decentralized systems work in practice.
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