Formal:
* Cybercrime: A broad term encompassing any crime committed using a computer or the internet.
* Electronic crime: Similar to cybercrime, focusing on illegal activity conducted through electronic means.
* Computer-related crime: A general term for any criminal activity involving computers.
* High-technology crime: Used when emphasizing the sophistication of the criminal activity.
* Digital crime: Emphasizes the digital nature of the crime.
* Information technology crime: Focuses on the role of technology in the crime.
* Cyberfraud: Specifically refers to fraudulent activities committed online.
Informal:
* Hacking: Often refers to unauthorized access to computer systems, but can be used broadly to encompass various computer crimes.
* Data theft: Stealing data from computers or networks.
* Phishing: A type of online scam involving fraudulent emails.
* Malware attacks: Using malicious software to harm computer systems or steal data.
* Cyberbullying: Harassing or threatening someone online.
* Cyberstalking: Obsessively tracking or harassing someone online.
* Online scams: A broad category encompassing various forms of fraud committed online.
Specific terms:
* Computer fraud: Deception involving a computer.
* Computer trespass: Unauthorized access to a computer system.
* Data breach: Unauthorized access to sensitive data.
* Identity theft: Stealing someone's personal information for fraudulent purposes.
* Copyright infringement: Illegal copying or distribution of copyrighted materials.
* Software piracy: Illegal copying or distribution of software.
The best synonym to use will depend on the specific context and the type of computer crime being discussed.