Posted on 26 novembre 2020.
Posted in InclassableSaisissez votre mot de passe pour accéder aux commentaires.
Posted on 28 mai 2020.
Allez hop, soyons fou, j’ai trouvé ce jour un exemplaire de Flottes de Combat 2008. Recherche les années 1918 à 1924 et 1927 … et puis on sera pas mal
Posted in Bâtiments, Inclassable, MarineCommentaires fermés sur Relance de conso suite Covid-19 – Je fais chauffer la CB pour mon 49ème Flottes de Combat
Posted on 17 avril 2020.
[SNAFU] When commenting out the ssl/tls config part in my my.cnf file [client] part I can see « mysql traffic » while logged whith a user that does not require SSL => OK
When activitating ssl/tls part config I can’t see anymore « mysql traffic » when logging in whith a user that does not require SSL/TLS => weird, no ?
No ! After somme times and a few searches
Posted in InclassableCommentaires fermés sur Wiresharking MariaDB traffic
Posted on 03 avril 2020.
Posted in InclassableCommentaires fermés sur Protégé : solutions
Posted on 01 avril 2020.
Juste besoin de cet execellent passage de Wikipedia (20200401)
RSA (Rivest–Shamir–Adleman) is one of the first public-key cryptosystems and is widely used for secure data transmission. In such a cryptosystem, the encryption key is public and distinct from the decryption key which is kept secret (private). In RSA, this asymmetry is based on the practical difficulty of factoring the product of two large prime numbers, the « factoring problem« . The acronym RSA is the initial letters of the surnames of Ron Rivest, Adi Shamir, and Leonard Adleman, who publicly described the algorithm in 1977. Clifford Cocks, an English mathematician working for the British intelligence agency Government Communications Headquarters (GCHQ), had developed an equivalent system in 1973, which was not declassified until 1997.[1]
A user of RSA creates and then publishes a public key based on two large prime numbers, along with an auxiliary value. The prime numbers must be kept secret. Anyone can use the public key to encrypt a message, but only someone with knowledge of the prime numbers can decode the message.[2] Breaking RSA encryption is known as the RSA problem. Whether it is as difficult as the factoring problem is an open question. There are no published methods to defeat the system if a large enough key is used.
RSA is a relatively slow algorithm, and because of this, it is less commonly used to directly encrypt user data. More often, RSA passes encrypted shared keys for symmetric key cryptography which in turn can perform bulk encryption-decryption operations at much higher speed.
Posted in InclassableCommentaires fermés sur RSA Cryptosystem overview
Posted on 01 avril 2020.
Posted in InclassableCommentaires fermés sur Protégé : RSA avec openSSL (petits exercices)
Posted on 01 avril 2020.
A few basics about RSA (Rivest – Shamir – Adleman) cryptography encryption and decryption in java. Just for comparison with what we habitually do with openSSL without understanding any command 🙂
Check it online.
Reminder : RSA is an Asymmetric encryption technique that uses two different keys as public and private keys to perform the encryption and decryption. With RSA, you can encrypt sensitive information with a public key and a matching private key is used to decrypt the encrypted message. See details on RSA Cryptosystem on Wikipedia.
Public and private keys generation using KeyPairGenerator and asymmetric encryption and decryption with these keys.
https://github.com/bcgit
https://github.com/anishnath/crypto-tool
https://github.com/jaysridhar/java-stuff
Posted in InclassableCommentaires fermés sur RSA encryption and decryption in Java
Posted on 07 mars 2020.
A l’occasion du forum des métier du numérique qui se tiendra à Saint-Malo le samedi 7 mars 2049, j’ai dépoussiéré ce vieil article d’il y a 3 ans : http://www.laurentmarot.fr/wordpress/?p=3737
D’ailleurs, il est grand temps que j’y aille 🙂
Posted in Inclassable1 Commentaire
Posted on 18 février 2020.
Bonne rigolade,
ca va parler un peu TLS, TDE, tout ça tout ça …
et puis ça augmente un peu la surface d’attaque de mon Honeypot
et puis ce sera un bon support pour mes TPs et mes tentatives d’acculturation au Ministère
https://www.digitalocean.com/community/tutorials/how-to-install-mariadb-on-debian-10
https://severalnines.com/blog/exploring-different-ways-encrypt-your-mariadb-data
Posted in InclassableCommentaires fermés sur MariaDB encryption for the dummies
Posted on 18 décembre 2019.
Posted in InclassableCommentaires fermés sur 4 mois extraordinaires