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【课堂-新手攻略】什么是社会工程？

This article explores the evolution of social engineering from its origins in psychological and sociological research to its current state as a crucial tool for information theft and fraud through manipulation of human psychology. The various tactics employed in cyberspace are detailed, including phishing, malware, and a particular focus on new challenges in the blockchain and cryptocurrency fields where emotions such as greed and fear are cunningly exploited by scammers to deceive investors. Finally, necessary strategies for defending against social engineering attacks are proposed, emphasizing the importance of enhancing cybersecurity literacy, rigorously identifying true and false information, and understanding the security mechanisms of cryptocurrencies.

What Is Social Engineering?

【课堂-新手攻略】Blockchain应用案例

Blockchain technology has significant applications in fields such as finance, supply chain, medical care, copyright, and the Internet of Things. It has played an important role in cryptocurrency, cross-border payments, supply chain finance, logistics tracking, anti-counterfeiting traceability, electronic health records, drug traceability, digital copyright management, art trading, equipment management, data trading, etc., improving the industry's transparency, security and efficiency.

Blockchain application cases

【课堂-深度研究】zk-SNARKs和zk-STARKs解释

This article delves into the core cryptographic concept of zero-knowledge proofs, illustrated through a vivid allegory of Alibaba's cave, where a prover can convince a verifier of a statement's validity without revealing any specifics. Focusing on blockchain applications, we discuss the characteristics and advantages of two zero-knowledge proof implementations – SNARKs, which excel in high-performance scenarios with their efficiency and conciseness, and STARKs, offering a transparent and trustless setup for security-conscious users. Despite distinct challenges, both technologies exhibit immense potential to enhance privacy in blockchain and streamline transaction verification, shaping the future of zero-knowledge proof advancements.

zk-SNARKs and zk-STARKs Explained

【课堂-进阶教程】什么是量化宽松（QE）？

This article introduces the fundamental principles and implementation context of quantitative easing as an unconventional monetary policy tool employed by central banks. Its aim is to stimulate market vitality and domestic demand growth by significantly increasing the money supply and suppressing long-term interest rates through large-scale purchases of financial assets. In global practice following financial crises, QE policies have achieved certain success in enhancing market liquidity and averting economic downturns. However, their effectiveness is complex and contentious, with potential risks including asset bubbles and surging debt levels. The article emphasizes the need for cautious application of QE policies tailored to specific circumstances of different economies, while closely monitoring both their advantages and challenges.

What Is Quantitative Easing (QE)?

【课堂-新手攻略】区块链运用案例：慈善

This article examines how blockchain technology is revolutionizing the charity model by building a "digital transparency" mechanism. By leveraging its distributed ledger and immutable nature, it enhances transparency and efficiency in the charitable sector. The specific applications of blockchain in charity are detailed, such as ensuring full transparency throughout the donation process, streamlining procedures, and increasing public trust. The paper also reveals the current challenges and limitations, including value volatility risks, security issues, and regulatory compliance requirements. Despite these challenges, digital charity holds promise as an important trend in the development of the charity industry, with successful real-world cases and continuous improvement of the legal environment.

How Blockchain Can Empower Charitable Causes

【课堂-进阶教程】什么是公钥密码学？

Public key cryptography is a pivotal technology in the realm of information security, revolving around an asymmetric key system comprised of a public key and a private key. Unlike symmetric encryption's single-key approach, this cryptographic method enables information to be encrypted using a public key, with decryption limits of authority exclusively held by the corresponding private key holder. This effectively addresses the challenge of key distribution and significantly enhances the safety of data transmission. The RSA algorithm, a major milestone in this field, establishes a practical public key infrastructure based on the difficulty of prime factorization of large numbers. Beyond its application in data encryption, public key cryptography plays a critical role in digital signatures, identity verification, and has become an indispensable component of modern cybersecurity frameworks.

What is Public Key Cryptography?

【课堂-新手攻略】为什么公共Wifi是不安全的？

Public Wi-Fi presents information security risks, such as lack of encryption protection and man-in-the-middle attacks. Taking measures such as VPN and HTTPS connections is an effective way to reduce risks, and protecting user privacy and information security is crucial.

Public WiFi Security Risks: How to Prevent Information Leakage

【课堂-新手攻略】什么是DoS攻击

DoS attacks and their more complex form, DDoS attacks, flood network resources with excessive traffic or malicious requests, blocking access for legitimate users and causing significant losses to businesses and individuals. As technology evolves, so do the methods of attack, including buffer overflow, ICMP flood, and SYN flood attacks. Cryptocurrency exchanges, in particular, have become high-risk targets for DDoS attacks. Nonetheless, the decentralized nature of blockchain provides natural protection against such attacks, especially for systems with high security and resilience like Bitcoin. Facing cyber threats, blockchain technology's inherent mechanisms display strong resistance, offering crucial security for the cryptocurrency sector.

What Is a DoS Attack?

【课堂-进阶教程】论博弈论和加密货币

Game theory employs mathematical logic to analyze decision-making behavior in specific situations, exemplified by the Prisoner's Dilemma, which demonstrates how individual rationality can lead to suboptimal collective outcomes. In the realm of cryptocurrencies, game theory is utilized to design secure economic systems; for instance, Bitcoin employs a PoW consensus mechanism, establishing an effective incentive structure that encourages participants, even in the absence of trust, to adopt strategies beneficial to the overall network stability, thereby ensuring the efficient and secure operation of decentralized networks.

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