Resources
Practical cybersecurity guides
Short, concrete guides for individuals, very small businesses and SMEs: what you need to know, what to do, and where to find the official sources.
All guides
- Good habitsSecuring your DNS: why and howFiltering blocks some known malicious sites; encryption shields your queries from prying eyes. Explanations and steps for households and small businesses.Read the guide
- Scams and threatsRecognising an IBAN change scamFake supplier, fake CEO, altered bank details: the warning signs of payment fraud, the verification procedure and what to do if you have already paid.Read the guide
- Good habitsManaging updates without spending all day on itSystem, browser, software, internet box: why updates matter, what to update first and how to organise patching in a very small business.Read the guide
- Scams and threatsRansomware: the right reflexes before, during and afterPreventing ransomware, responding to an infection (isolate, don't pay, file a complaint) and getting back up. Practical advice for businesses and individuals.Read the guide
- Good habitsPasswords and passkeys: securing your accountsCreate strong, unique passwords, use a password manager, turn on two-factor authentication and switch to passkeys: the simple guide.Read the guide
- In the workplaceSecuring a remote employee's computerCompany laptop, updates, encryption, Wi-Fi, remote access, separate uses: the checklist for secure remote work in small businesses and SMEs.Read the guide
- RegulationNIS2: who is affected and where to start?Directive (UE) 2022/2555: sectors, size, essential and important entities, article 21 measures, incident reporting. Key points, with ANSSI references.Read the guide
- Scams and threatsRecognising phishingFake parcel, fake bank, fake tax office: the signs of a phishing message, the right reflexes and where to report it (33700, Signal Spam, 17Cyber).Read the guide
- In the workplaceBackups: the 3-2-1 rule explainedThree copies, two media, one off-site and offline: applying the 3-2-1 rule, testing restoration and protecting backups against ransomware.Read the guide
- In the workplaceHit by a cyberattack: what to do in the first hourIsolate, alert, preserve evidence, don't pay, report (17Cyber, complaint, CNIL within 72 h): step-by-step guidance in the event of an incident.Read the guide
In an emergencyVictim of a cyberattack or online scam? The French public service 17Cyber (17cyber.gouv.fr) offers free guidance, and you can still file a complaint with the police or gendarmerie. In a life-threatening emergency or if an offence is in progress, call 17 or 112.