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Me on Twitter

  • mlocate will never ruin my evenings anymore ! UNINSTALLED ! https://t.co/07wCGOZv2Q 3 years 22 weeks ago
  • "failed to build cryptography" of course... 3 years 23 weeks ago
  • The worst is that I already know that I forgot some optional openssl dependencies and that I'll need to start again... 3 years 23 weeks ago
  • Building https://t.co/oTfN2b5DJ4 inside #docker on #armv7 ... Let's go to bed and see if it's done tomorrow morning… https://t.co/6xUegSZlZz 3 years 23 weeks ago
  • RT @Unexplained: Caption this! https://t.co/FobPIx7gXB 3 years 24 weeks ago
  • Nice pattern : proposing the user to test his password before disconnecting from an always-connected app #keybase #security 3 years 24 weeks ago
  • RT @esascience: These cosmic #fireworks are the motions of numerous stars at the outskirts of our Milky Way as measured by @ESAGaia! 3 years 24 weeks ago
  • Want to really understand how bitcoin works? Here’s a gentle primer | Ars Technica - https://t.co/7nVsFJzG8X 3 years 25 weeks ago
  • @MCetMOI Impossible d'installer l'appli sur un smartphone sans Google... Je crois que je vais arrêter là... Du mal… https://t.co/owPEvVJNXk 3 years 29 weeks ago
  • @MCetMOI Euh... Application d'authentification mise en avant sur des sites d'Etat mais certificat de… https://t.co/EDnElhpcZQ 3 years 29 weeks ago

keytool

android A paper backup for your private key

Android keychainAndroid requires developers to sign their applications with a digital certificate and that each future release be signed with the same certificate.

Sadly, bad things happen when the developer (you) looses access to the certificate : he (you) will not be able to release updates for the application without it. NeverEver.

Android does not currently support multiple certificates per application so the best you could do would be to release a new app with the same name, in the hope your users will find a way to it by themselves.

As years go on, you will change your computer, wipe USB keys, reinstall OS, ...
So many dangerous operations for your digital certificates, hidden among millions of files !
If, like me, you are anxious at the idea of losing your certificates or passwords, just print a paper copy !
Although it is not invulnerable, paper should be less prone to mass erasing than a simple electronic file.

The idea is simplenot new, and you just need to know two commands to get a printable hard copy of your certificate.

Let's start.

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