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Blockchain is a distributed database or ledger technology that records and stores transaction information through cryptographically linked data blocks, forming an immutable chain. As a decentralized system, it allows multiple parties to maintain and verify the integrity of transaction records without a central authority, typically categorized into three types: public, consortium, and private blockchains.

A crypto cold wallet is a secure offline storage method for cryptocurrencies that completely isolates users' private keys from the internet to prevent cyber attacks. Cold wallets primarily come in three forms: hardware devices, paper wallets, and offline software solutions, representing the highest security standard for cryptocurrency asset storage.

A cipher is a mathematical algorithm that transforms plaintext information into seemingly random ciphertext, making it difficult to understand without authorization while allowing authorized parties to decrypt it using specific keys. In the blockchain domain, ciphers primarily fall into three categories: symmetric encryption (using the same key for encryption and decryption), asymmetric encryption (using public-private key pairs), and hash functions (one-way transformations), collectively forming the securi

Accountability in blockchain and decentralized systems is a governance framework that ensures participants are responsible for their actions, built on three core elements: transparency, responsibility allocation, and consequence management. It functions through immutable records, cryptographic verification, and smart contract execution, differing from traditional centralized systems by incorporating both technical and social dimensions rather than relying on regulatory authorities.

Fear, Uncertainty, and Doubt (FUD) refers to a strategy of spreading negative, misleading, or exaggerated information to create market panic in the cryptocurrency space. This market manipulation tactic aims to influence investor sentiment and provoke irrational decision-making, such as panic selling. FUD typically emerges from three main sources: external regulatory threats, strategic attacks from competing projects, and market volatility generated by large holders seeking to accumulate at lower prices.

Hash is a cryptographic function that converts data of arbitrary size into a fixed-length string, known as a hash value or digital fingerprint. Hash functions possess three key properties: one-way function (irreversibility), deterministic output (same input always produces identical output), and avalanche effect (small input changes cause significantly different outputs). Common hash algorithms in blockchain include SHA-256 used by Bitcoin and Keccak-256 used by Ethereum.

Internet Service Provider (ISP) is a company or organization that provides internet access, data transmission, and related services to individuals and businesses by establishing and maintaining the network infrastructure connecting end users to the global internet. ISPs are typically categorized into three main types: access ISPs, transit ISPs, and content ISPs.