Terms related to cryptocurrency and blockchain security, including private keys, seed phrases, 2FA, multisig, cold storage and other concepts.

Seed-Phrase Security

Protecting the master recovery secret of a wallet

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Zero-Knowledge Proof

Proving knowledge without revealing the secret

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Cryptographic Hash

A digital fingerprint for cryptographic applications

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51% Attack

Majority control over a blockchain consensus resource

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Crypto Security

Protecting crypto assets, wallets, and blockchain systems

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Cryptojacking

Unauthorized use of computing resources for mining

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Man-in-the-Middle

Intercepting and modifying communications

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Encryption

Protecting data from unauthorized reading

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Smart Contract Audit

Reviewing smart-contract code for vulnerabilities

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Digital Signature

Cryptographic proof of authorization and integrity

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Hash Function

Converting data into a fixed-size fingerprint

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Private-Key Security

Protecting the key that controls crypto assets

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Social Engineering

Manipulating users instead of directly breaking systems

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Phishing

Fake websites and messages designed to steal data

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Replay Attack

Reusing previously valid signed data

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Eclipse Attack

Isolating a node from the honest network

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Sybil Attack

Creating many fake participants in a network

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Double-Spending

Attempting to spend the same funds twice

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