Ransomware
security · cybercrime
Malware that encrypts a victim’s data and demands payment—often in cryptocurrency—for decryption.
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.
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
→A network-specific identifier that describes a destination or spending condition for a cryptocurrency payment.
wallet · technical