====== instant messenger ======

Messagerie instantanée

https://signal.org/fr/

https://telegram.org/

[[http://www.snapchat.com/|Snapchat]], [[wp>Snapchat]]

[[https://wickr.com/|Wickr]], [[wp>Wickr]]

[[http://www.whatsapp.com/|WhatsApp]], [[wp>WhatsApp]], la page [[https://www.whatsapp.com/security?lg=fr&lc=FR|Sécurité sur WhatsApp]] contient un lien vers le PDF détaillant la cryptographie mise en œuvre (Signe avec Curve25519 et chiffre avec An 80-byte value that is used to encrypt message contents. 32 bytes are used for an AES-256 key, 32 bytes for a HMAC-SHA256 key, and 16 bytes for an IV.). Note:  In  cases  where  a  business  user  delegates  operation  of  their  Business  API  client  to  a  vendor,  **that  vendor  will  have  access  to  their private keys** - including if that vendor is Facebook. However, these private  keys  will  still  not  be  stored  on  the  WhatsApp  chat  server .  See  below for details