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        <title>crypto-symmetrique-bloc</title>
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        <description>Presentation

Voici la présentation les mécanismes de la cryptographie symétrique par bloc:</description>
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        <title>gpg</title>
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        <description>CLI GPG

Installation

Sous Debian / Ubuntu :
 $ sudo apt-get install gpgv2
Options de base

pour accéder aux paramètres essentiels.

Version de gpg
  $ gpg --version
Lister les clefs publiques du public_keyring
  $ gpg2 --list-secret-keys    
  $ gpg -K</description>
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        <description>Stockage redondant et résiliant de mots de passe

Concept

Quatre clefs A,B,C,D à retenir/stocker  :   



Sources

Les sources sont disponibles sur le dépôt Infosec (/key-management).</description>
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        <description>Configuration du client SSH

Présentation des options du fichier de configuration du client ssh.

Localisation du fichier de configuration :

	*  Fichier de configuration global du système : /etc/ssh/ssh_config

c&#039;est dans ce répertoire que l&#039;on trouvera entre autre le fichier de configuration</description>
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        <title>ssh</title>
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        <description>SSH : Étude du Secure Shell

	*   Principe du Secure Shell 
	*   Configuration client ssh 
	*   Configuration server ssh 

Générer des clefs ssh

Exporter des clefs ssh
  # export ssh public key to server
	*  &#039;a la main&#039;
  $ cat ~/.ssh/id_ecdsa.pub | ssh david@176.136.174.5 &#039;cat &gt;&gt; .ssh/authorized_keys &amp;&amp; echo &quot;Key copied&quot;&#039;</description>
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        <description>Configuration du server SSH

SSH PROTOCOL OVERVIEW

PROTOCOL NEGO
* protocol identitifcation

KEY EXCHANGE NEGO
* key exchange algorithm negotiation 
* key exchange --&gt; creation symmetric_key

AUTH
* Server auth
* Client auth

CIPHER NEGO
* MAC, Message Authentication Code (Cipher + Hash )</description>
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        <title>sshd_config</title>
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        <description>Configuration du server SSH

Présentation des options du fichier de configuration du server ssh.

Localisation du fichier de configuration :

	*  Fichier de configuration global du système : /etc/ssh/sshd_config

c&#039;est dans ce répertoire que l&#039;on trouvera entre autre le fichier de configuration</description>
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