Ransomware
security · cybercrime
Malware that encrypts a victim’s data and demands payment—often in cryptocurrency—for decryption.
1.definition
Ransomware is malware that encrypts files, locks systems, or steals data and then demands payment for decryption or non-disclosure. Attackers often request cryptocurrency because it can be transferred globally, but payments are traceable on public blockchains and may be subject to legal restrictions.
2.prevention
Resilience depends on security basics: offline backups, patching, least-privilege access, multi-factor authentication, phishing training, endpoint monitoring, and a tested incident response plan. Paying is risky because decryption is not guaranteed and funds may support criminal activity.
Related terms
Privacy
→The ability to transact without revealing sensitive information about identity, balances, or counterparties.
security · principle
Custodial Wallet
→A wallet where a third party controls the private keys on your behalf.
wallet · security
Non-Custodial Wallet
→A wallet in which the user controls the signing keys or authorization needed to move funds.
wallet · custody
Address
→The destination you share to receive a cryptocurrency payment on a particular network.
wallet · technical
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