API write issue (PUT / POST)

Thank you, you're right, the problem was just about the 256.
With 128 bits it works now!

I was simply following this documentation that uses 256:
www.projeqtor.org/media/kunena/attachmen...abled%20by%20default.

Donnée brute : {"id":"7", "figgoId":"8"}
Donnée chiffrée : VQDiWUxpBWLaiLih2Vbr9W/PaF+n8xRVGcJHfflgj9lb
{"identifier":"id", "items":[{"apiResult":"OK", "apiResultMessage":"Ressource #7 mis à jour", "id":"7", "figgoId":"8", [...] }] }