This is just a quick reminder of what we have been recommending throughout this course so far:

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• the generation of the seed must (!) be done in a secure and cold computer.

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• the storage of the seed can be physical and/or digital:

  • physical storage (e.g. paper or metal) should be geographically dispersed: e.g. by using multisig wallets and/or by splitting the seed and/or the BIP39 passphrase and storing the different parts in different geographical places so that they are not immediately available to you: if you can easily and immediately access your bitcoins, probably they are not secure enough.

  • digital storage:

    • must (!) be in a secure and cold support (e.g. a cold Tails USB stick that was mounted only on cold and secure machines).

    • and should be geographically dispersed (again by using multisig wallets and/or by splitting the seed and/or the BIP39 passphrase).

    • the techniques illustrated in Course 1 also significantly increase the possibilities of secure/cold storage and significantly improve security against different kinds of attacks.

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The security of your Bitcoins depends in significant part by observing these best practices.