{ "item_title" : "Applied Blockchain and Distributed Systems", "item_author" : [" M. Bagya Lakshmi", "Y. Harold Robinson "], "item_description" : "This advanced workbook completes the three-year blockchain journey by exploring architectural internals-how distributed systems achieve security without central authority. Day One examines cryptographic primitives: hashing creates digital fingerprints where even tiny changes transform outputs, making tampering evident. Asymmetric encryption enables self-sovereign identity-users generate key pairs through mathematics rather than asking permission. Digital signatures prove ownership without revealing secrets. Day Two reveals block anatomy: Merkle trees efficiently summarize thousands of transactions into single roots stored in headers. Previous hashes create chains where modifying one block invalidates all subsequent-the source of immutability. Consensus mechanisms solve the Byzantine Generals Problem: Proof of Work makes attacks economically impossible through computational costs, while longest chain rules resolve temporary forks. Day Three animates the network: gossip protocols spread transactions exponentially without central servers. Mempools create fee markets where users compete for inclusion.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/6/20/963/399/6209633994_b.jpg", "price_data" : { "retail_price" : "50.92", "online_price" : "50.92", "our_price" : "50.92", "club_price" : "50.92", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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