Technology Security & Threats — C1 Essential Words

encryption /ɪnˈkrɪpʃən/ noun C1 Technology

Meaning: The process of changing information into a secret code so that only the intended people can read it; the basis of private messages and secure banking.

Example: The app uses end-to-end encryption.

Another example: Encryption protects your messages.

Collocations: encryption of · end-to-end encryption · strong encryption

Synonyms: encoding, scrambling, cipher

Antonyms: plain text

Word family: encrypt (v) · encrypted (adj)

⚠ Common mistake: 'End-to-end' means even the company cannot read it — the phrase that made it famous. Every padlock icon in your browser is this word at work.

🗣 In spoken American English: Governments and privacy advocates argue over its keys permanently.

Register: Formal — security essential.

malware /ˈmælweər/ noun C1 Technology

Meaning: Software designed to harm, damage, or secretly control a computer or phone — viruses, ransomware, and spyware are its kinds.

Example: The file contained malware.

Another example: Malware infected thousands of computers.

Collocations: malware attack · malware in · the malware

Synonyms: virus, spyware, harmful software

Antonyms: antivirus

Word family: malware (uncountable) · malicious (adj)

⚠ Common mistake: MALicious + softWARE squeezed into one word. It travels by exactly the clicks its warnings describe — the curriculum writes itself.

🗣 In spoken American English: Its removal tools are an industry of digital janitors.

Register: Formal — security essential.

password manager /ˈpæswɜːrd ˈmænɪdʒər/ noun C1 Technology

Meaning: An application that securely stores all your passwords in an encrypted vault, so you only need to remember one master password.

Example: A password manager creates strong passwords for you.

Another example: She keeps every login in her password manager.

Collocations: a password manager · password manager app · use a password manager

Synonyms: vault, password keeper, keychain (Apple's)

Word family: password managers (n pl) · password (n)

⚠ Common mistake: The security advice trio is now complete on this site: strong passwords, two-factor, and this manager to hold them all. One master key guarding a hundred doors.

🗣 In spoken American English: Its enemy is the notebook by the monitor — still undefeated in many offices.

Register: Formal — security essential.

phishing /ˈfɪʃɪŋ/ noun C1 Technology

Meaning: The crime of sending fake emails or messages that look official, tricking people into revealing passwords, card numbers, or personal information.

Example: The bank warned customers about phishing.

Another example: Phishing emails fake the bank's logo.

Collocations: phishing emails · phishing attack · phishing scam

Synonyms: fraud, spoofing, scam

Word family: phishing (uncountable) · phish (v) · phisher (n)

⚠ Common mistake: Spelled PH because its first hackers were 'phreaks' — the net's oldest spelling joke. The hook is urgency ('act now!') plus a logo.

🗣 In spoken American English: Its training tests (fake phishing sent by your own company) embarrass kindly and teach well.

Register: Formal — security essential.

cyberattack /ˈsaɪbər əˈtæk/ noun C1 Technology

Meaning: An attack carried out through computers and networks by criminals or hostile states, aiming to steal data, damage systems, or stop services.

Example: The cyberattack shut down the airline's website.

Another example: Hospitals prepare for cyberattacks.

Collocations: a cyberattack · cyberattack on · cyberattack wave

Synonyms: hack, digital attack, breach

Word family: cyberattacks (n pl) · cyber (prefix) · attack (n/v)

⚠ Common mistake: One word in American style (cyberattack), like its cousins cybersecurity and cyberspace. Its targets graduate yearly from banks to pipelines to hospitals.

🗣 In spoken American English: Its defenders rehearse for it like fire drills — the new emergency services training.

Register: Formal — security essential.

breach /briːtʃ/ noun / verb C1 Technology

Meaning: A failure of security in which private data is accessed or stolen (a data breach); also breaking an agreement or a wall's gap, formally.

Example: The data breach exposed emails.

Another example: Hackers breached the system.

Collocations: a data breach · breach of security · breach the wall

Synonyms: leak, break-in, violation

Antonyms: security, seal

Word family: breaches (n pl) · breach (v)

⚠ Common mistake: Whales breach too (leaping from water) — same breaking-through idea, better photos. Contracts fear its legal sense (breach of contract) equally.

🗣 In spoken American English: Its headlines arrive with the phrase 'what to do if you were affected'.

Register: Formal — security essential.

biometrics /ˌbaɪəˈmetrɪks/ noun C1 Technology

Meaning: Technology that identifies people by unique body characteristics — fingerprints, faces, eyes, or voice — used instead of passwords.

Example: The phone unlocks with biometrics.

Another example: Airports use biometrics at gates.

Collocations: biometrics · biometric data · biometrics system

Synonyms: fingerprint ID, face recognition, body ID

Antonyms: passwords

Word family: biometric (adj) · biometrics (n plural form)

⚠ Common mistake: Your body becomes the password — convenient until you remember you cannot change your fingerprints like a leaked password. Phones made it mundane in a decade.

🗣 In spoken American English: Its border gates read faces faster than officers ever stamped.

Register: Formal — security depth.

ransomware /ˈrænsəmweər/ noun C1 Technology

Meaning: Malware that locks a victim's files or computer and demands payment (a ransom) to unlock them.

Example: Ransomware shut down the hospital's systems.

Another example: Never pay — report ransomware.

Collocations: ransomware attack · ransomware locked · the ransomware

Synonyms: extortion software, crypto-locker, malware (family)

Word family: ransomware (uncountable)

⚠ Common mistake: Hospitals and pipelines are its headline victims — the ransom is priced in cryptocurrency and panic. Backups are its only true antidote, experts repeat.

🗣 In spoken American English: Its countdown timers are theater designed to hurry payment.

Register: Formal — security essential.

antivirus /ˌæntiˈvaɪrəs/ noun / adjective C1 Technology

Meaning: Software that protects a computer by finding and removing viruses and other malware; also describing such protection.

Example: Install antivirus on the new laptop.

Another example: The antivirus caught the threat.

Collocations: antivirus software · the antivirus · antivirus scan

Synonyms: protection, security software, defender

Antonyms: malware

Word family: antivirus (n) · antivirus (adj)

⚠ Common mistake: Modern versions fight the whole malware family, not just viruses — the name is a veteran of an older war. Its scans are computing's regular checkups.

🗣 In spoken American English: Free built-in defenders ended its separate-purchase era for most users.

Register: Formal — security essential.

passkey /ˈpæskiː/ noun C1 Technology

Meaning: A modern digital key stored on your device that lets you sign in with your fingerprint, face, or PIN instead of typing a password; promoted by Apple, Google, and Microsoft as the password's replacement.

Example: Sign in with a passkey instead of a password.

Another example: The site offered to create a passkey.

Collocations: a passkey · passkey sign-in · create a passkey

Synonyms: digital key, passwordless login, credential

Antonyms: password (the older way)

Word family: passkeys (n pl) · pass (v) · key (n)

⚠ Common mistake: Hotels had the physical word first (a key that opens many doors). Tech's version syncs between your devices and cannot be phished — the password's obituary is being drafted in its name.

🗣 In spoken American English: Its icon (a person with a key) is arriving on login screens everywhere this decade.

Register: Formal — security frontier.