Solution : https://service.sap.com/sap/support/notes/1327917 (SAP Service marketplace login required)
Key words : 
create security deposit, change security deposit, display security deposit, access transactions fpsec1, terms fpsec1, required authorization, authorization check, saplfkk_sec reason, previously provided, validity section
Related Notes : 
       
| 1472982 | Authorization check for FPSEC1 also in non-dialog mode | 
| 1381777 | Authorization check for FPSEC1, FPSEC2, FPSEC3 incorrect | 
| 888889 | Automatic checks for security notes using RSECNOTE |