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Skillrung

Guides

Guides on cybersecurity, AI and compliance

Short answers to precise questions, backed by the publications of ANSSI, the CNIL, Cybermalveillance.gouv.fr and Légifrance. Every figure carries its source and its date.

Cybersecurity

  • Two-factor authentication: how to switch it on, and which accounts come first

    Two-factor authentication adds a second proof to your password: a temporary code, a notification to approve, or a physical security key. A stolen password is then no longer enough to get in. Switch it on first for your work email, then for your banking and payment access and your work tools. You do it in each service's security settings, and it takes about five minutes per account.

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  • Backing up your work data: what, where and how often

    Backing up means keeping a copy of your files somewhere other than the device that produces them. Back up the documents you could not recreate: accounts, client files, contracts, site photos. Keep at least two copies, one of them disconnected from the network, because ransomware encrypts everything it can reach. Once a week is rarely enough: set the frequency by how much work you are willing to lose again.

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  • Security updates: why you should install them, and when to do it

    A security update fixes a flaw that attackers already know about. Until it is installed, your device stays open to an automated attack that targets no one in particular. Install it within a few days, switch on automatic installation wherever possible, and do not forget the phone, the router or your business software. A device that no longer receives updates needs replacing.

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Artificial intelligence

  • AI vocabulary in four words: token, context, prompt, hallucination

    Four words are enough to understand a generative AI at work. A token is the piece of text the tool reads and bills for. The context is the memory of the current conversation, and it is necessarily limited. The prompt is the instruction you write. A hallucination is a false answer delivered with confidence. These four notions explain almost every surprise you will meet in daily use.

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  • How to check an AI answer: five checks before you use it

    You check an AI answer in five steps: open every source it cites, isolate the precise elements such as figures and references, ask the question again in a fresh conversation, ask what weakens the answer, then have it read by someone who knows the subject. A tool never checks itself: the user is the one who triggers the check.

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Compliance & personal data

  • What data can you share with an AI: the four confidentiality levels

    There are four confidentiality levels for an AI tool: the consumer service, the professional service under contract, European hosting and the model installed on your own premises. You do not have to choose one level for the whole organisation: you choose one per type of data, from public text to a document covered by professional secrecy.

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