An Overview of Blockchain Technology, Value, and Applications by Tencent Cloud

Introduction: Ten years after Bitcoin, blockchain emerged as a technology beyond cryptocurrency, offering decentralized, tamper‑proof, traceable shared ledger.

1. The Origin of Blockchain

Human technology is divided into energy‑based and information‑processing. Blockchain belongs to the latter, enabling decentralized state without a central gatekeeper. An illustrative example of 32 locks in a residential gate demonstrates decentralization, private keys, and chain structure.

2. Key Technical Components

Blockchain consists of five parts: dynamic P2P network, block data structure, consensus mechanism, cryptography, and smart contracts.

3. What is Blockchain?

It is a tamper‑proof, traceable, shared distributed ledger (DLT). Features include multi‑node redundant storage, cryptographic hashing, and immutable records.

4. How Tamper‑Proofness is Achieved

Through linked block hashes, proof‑of‑work (or other consensus), and multi‑node verification.

5. Block and Chain Structure

Each block contains the previous block’s hash, its own hash, timestamp, and transaction data.

6. From Information Internet to Value Internet

Blockchain adds value‑level trust and zero‑cost asset transfer, enabling digital assets and rapid economic activity.

7. Blockchain Classification

Public chain, consortium (alliance) chain, and private chain, each with different access controls and performance.

8. Applications

Core use‑cases are tamper‑proof data storage, digital evidence, intellectual‑property proof, supply‑chain traceability, and asset tokenization.

9. Tencent Cloud Blockchain

Tencent Cloud provides a BaaS platform supporting its own chain and Hyperledger Fabric, offering flexible deployment (cloud, on‑premise, hybrid) and governance tools.

10. Zhixin Chain Product

Provides electronic evidence (存证) services, integrating with “Micro Court” for online litigation, supporting hash‑based proof, privacy‑preserving encryption, and archiving.

11. Technical Solutions

Discusses on‑chain data handling, privacy encryption methods (hash, symmetric, homomorphic, zero‑knowledge), data explosion mitigation, cross‑chain interoperability, and integration with IoT, AI, big data, and cloud.

12. Q&A Highlights

Answers cover use‑cases of blockchain evidence, consensus algorithms, handling illegal content, archiving impact, data storage, trustworthiness of pre‑on‑chain data, and the necessity of blockchain over traditional e‑evidence.