(19)
(11) EP 2 057 777 A2

(12)

(88) Date of publication A3:
10.04.2008

(43) Date of publication:
13.05.2009 Bulletin 2009/20

(21) Application number: 07805758.5

(22) Date of filing: 03.08.2007
(51) International Patent Classification (IPC): 
H04L 9/32(2006.01)
(86) International application number:
PCT/IT2007/000565
(87) International publication number:
WO 2008/015723 (07.02.2008 Gazette 2008/06)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 04.08.2006 IT RM20060426

(71) Applicant: Khamsa Italia S.r.l.
20147 Milano (IT)

(72) Inventors:
  • MORO, Federico
    22100 Como (IT)
  • BOCCACCIA, Lorenzo
    29100 Piacenza (IT)
  • PIETROSANTI, Fabio
    04100 Latina (IT)

(74) Representative: Fiammenghi-Domenighetti, Delfina 
Fiammenghi-Fiammenghi Via Quattro Fontane 31
00184 Roma
00184 Roma (IT)

   


(54) METHOD OF RECORDING A NOT REPUDIABLE DIGITAL TRANSMISSION OF INFORMATION AND IDENTIFYING THE PARTICIPANTS IN THE COMMUNICATION