Giu 122017
 

Molte delle stampanti in commercio, specialmente quelle a colori, stampano un codice quasi impercettibile formato da puntini gialli. Questo codice contiene informazioni come il numero di serie della stampante, la data e l’ora della stampa. Ecco un esempio di quanto stampato:

La tecnica di codifica è basata sulla Stenografia e venne introdotta negli anni ’90 da aziende come Xerox per convincere i governi che le loro stampanti non potevano essere usate per la contraffazione.
Il “nobile” intento ha però una seconda faccia della medaglia, ovvero lede totalmente il diritto di privacy degli onesti cittadini e mette nelle mani dei governi un ulteriore strumento di coercizione.

Un esempio eclatante è quanto accaduto nei primi mesi del 2017 quando i giornalisti del “The Intercept” hanno inviato alla NSA il documento anonimo contenente informazioni sui presunti tentativi del governo Russo di interferire nelle elezioni presidenziali Statunitensi.
Tramite la codifica stenografica impressa dalla stampante la NSA è risalita a Reality Leigh Winner, una dipendente di una società che collabora con l’agenzia governativa.

Ancora una volta la libertà di pensiero e di parola è stata sottomessa ai fini di quei governi che non hanno interesse a far emergere verità scomode.

La Electronic Frontier Foundation ha sviluppato un software che svela quali stampanti imprimono il loro “marchio” sui fogli che stampate e ha stilato un elenco delle stampanti incriminate: https://www.eff.org/it/pages/list-printers-which-do-or-do-not-display-tracking-dots

La tua stampante è una spia?

Table of printers

Manufacturer Model Dots? Comments
Brother
  HL-2700CN yes volunteer test
  HL-4200CN yes EFF test
Canon
  CLC 1000 yes EFF
test
  CLC 2400 yes EFF
test
  CLC 3002 yes EFF
test
  CLC 4000 yes EFF
test
  CLC 5000+ yes EFF test
  CLC-iR 3200-C1 yes EFF test
  Color imageRUNNER C2570 yes EFF test
  Color imageRUNNER C3100CN yes EFF test
  Color imageRUNNER C3200 yes EFF test
  Color imageRUNNER C3200N yes EFF test
  Color imageRUNNER C3220 yes EFF test
  Color Laser Copier 1150 yes EFF test
  Imageclass MF8170C yes EFF test
  LBP 2410 unclear faint dots; could be artifacts
Dell
  3000CN yes EFF
test
  3100CN yes EFF
test
  5100CN yes EFF
test
Epson
  AcuLaser C900 yes EFF test
  AcuLaser C1100 yes EFF test
  AcuLaser C1500 yes EFF test
  AcuLaser C1900 yes EFF test
  AcuLaser C3000 yes EFF test
  AcuLaser C4000 yes EFF test
Fuji: see Xerox
Hewlett-Packard
  Color LaserJET 1550L yes EFF test
  Color LaserJET 1600 yes EFF test
  Color LaserJET 2250LN no
(??)
EFF test
  Color LaserJET 2500 yes EFF test
  Color LaserJET 2500L yes EFF test
  Color LaserJET 2500N yes EFF test
  Color LaserJET 2550 yes EFF test
  Color LaserJET 2550L yes EFF test
  Color LaserJET 2550N yes EFF test
  Color LaserJET 2600N yes EFF test
  Color LaserJET 2680 yes EFF test
  Color LaserJET 2700N yes volunteer test
  Color LaserJET 2840 yes EFF test
  Color LaserJET 3500 yes EFF test
  Color LaserJET 3550 yes EFF test
  Color LaserJET 3600DN yes EFF test
  Color LaserJET 3700 yes EFF test
  Color LaserJET 3700DN yes EFF test
  Color LaserJET 3700N yes EFF test
  Color LaserJET 4500 no EFF test
  Color LaserJET 4500DN no EFF test
  Color LaserJET 4500N no EFF test
  Color LaserJET 4550 no EFF test
  Color LaserJET 4550N no EFF test
  Color LaserJET 4600 yes EFF test
  Color LaserJET 4600DN yes EFF test
  Color LaserJET 4600HDN yes EFF test
  Color LaserJET 4600N yes EFF test
  Color LaserJET 4650 yes EFF test
  Color LaserJET 4650DN yes EFF test
  Color LaserJET 4650DTN yes EFF test
  Color LaserJET 4700 yes volunteer test
  Color LaserJET 4700DN yes volunteer test
  Color LaserJET 4700DTN yes volunteer test
  Color LaserJET 5M no EFF test
  Color LaserJET 5100CN yes EFF test
  Color LaserJET 5500 yes EFF test
  Color LaserJET 5500ATN yes EFF test
  Color LaserJET 5500DN yes EFF test
  Color LaserJET 5500HDN yes EFF test
  Color LaserJET 5550 yes EFF test
  Color LaserJET 5550DN yes EFF test
  Color LaserJET 5550DTN yes EFF test
  Color LaserJET 8500 no EFF test
  Color LaserJET 8500DN no EFF test
  Color LaserJET 8550 no EFF test
  Color LaserJET 8550DN no EFF test
  Color LaserJET 8550GN no EFF test
  Color LaserJET 9500 yes EFF test
  Color LaserJET 9500HDN yes EFF test
  Color LaserJET 9500MFP yes EFF test
IBM
  Infoprint Color 1454 unclear dithering?
  Infoprint Color 1464 PS3 yes dithering?
Konica
   (Konica/Minolta)
  Bizhub C252 yes EFF test
  Bizhub C350 yes EFF test
  Colorforce 1501 yes EFF test
  Colorforce 8050 yes EFF test
  DialtaColor CF 2001 unclear dithering?
  DialtaColor CF 2002 unclear dithering?
  Ikon CPP500E yes EFF test
  Magicolor 2 Desklaser no EFF test
  Magicolor 2200 DL yes EFF test
  Magicolor 2210 yes EFF test
  Magicolor 2300 DL yes EFF test
  Magicolor 2300 W yes EFF test
  Magicolor 2350 yes EFF test
  Magicolor 2350 EN yes EFF test
  Magicolor 2400 W yes EFF test
  Magicolor 2430 DL yes EFF test
  Magicolor 2450 yes EFF test
  Magicolor 3100 yes EFF test
  Magicolor 3300 yes EFF test
  Magicolor 5450 yes EFF test
  Magicolor 7300 yes EFF test
Kyocera
  C2630D yes EFF test
  FS-C5016N yes EFF test
  FS-C5020N yes EFF test
  FS-C5030N yes EFF test
  FS-C8008 yes EFF
test
  Mita KM-C2230 yes EFF test
Lanier
  LD238C yes EFF
test
  LP125CX/LP126CN yes EFF test
Lexmark
  C510 yes EFF
test
  C720 unclear retest
  C752 yes EFF
test
  C752N yes EFF
test
  C760 yes EFF
test
  C910 yes EFF
test
  C912 yes EFF
test
Minolta:
see
Konica
NRG
  DSc38 yes EFF
test
OkiDATA
    (Oki)
  C5100 no EFF
test
  C5150 no EFF
test
  C5150N no EFF
test
  C5200 no EFF
test
  C5300 no EFF
test
  C7200 no EFF
test
  C7350 no EFF
test
  C7400 no EFF
test
  C7400N no EFF
test
  C9200 no EFF
test
  C9300 no EFF
test
  C9400 no EFF
test
  MIP C5540 no EFF
test
  OkiLAN 8100E no EFF test
Panasonic
  Workio KXCL-500 yes EFF test
Ricoh
    (see also Savin)
  Aficio 1224C yes EFF test
  Aficio 1232C yes EFF test
  Aficio CL 2000 yes press report
  Aficio CL 3000 yes EFF test
  Aficio CL 3000E yes EFF test
  Aficio CL 6010 yes EFF test
  Aficio CL 7000 yes EFF test
  AP 206 yes EFF
test
  Infotec/Danka ISC 2838 yes EFF test
Samsung
  CLP-500 no EFF
test
  CLP-510 no EFF
test
  CLP-550 no EFF
test
  CLP-550N no EFF
test
Savin
  C3210 yes EFF
test
  CLP35 yes EFF
test
Tektronix:
see
Xerox
Toshiba
  eStudio 210c yes mfr. statement
  eStudio 211c yes mfr. statement
  eStudio 310c yes mfr. statement
  eStudio 311c yes mfr. statement
  eStudio 2100c yes mfr. statement
  eStudio 3100c yes mfr. statement
  eStudio 3511 yes EFF test
  FC15 yes mfr. statement
  FC15i yes mfr. statement
  FC22 yes mfr. statement
  FC22i yes mfr. statement
  FC25P yes mfr. statement
  FC25Pi yes mfr. statement
  FC70 yes mfr. statement
Xerox
  (Tektronix)
  DocuColor 12 yes EFF test
  DocuColor 40 yes EFF test
  DocuColor 1521 yes EFF test
  DocuColor 1632 yes EFF test
  DocuColor 2000 yes mfr. statement
  DocuColor 2045 yes EFF test
  DocuColor 2240 yes EFF test
  DocuColor 3535 yes EFF test
  DocuColor 5252 yes EFF test/mfr. statement
  DocuColor 6060 yes EFF test/mfr. statement
  Phaser 560 no EFF test
  Phaser 740 no EFF test
  Phaser 750 (Z750V) no EFF test
  Phaser 750P no EFF test
  Phaser 790 yes EFF test
  Phaser 850DP no EFF test
  Phaser 860DP no EFF test
  Phaser 1235 no EFF test
  Phaser 6100 no EFF test
  Phaser 6200 no EFF test
  Phaser 6200DP no EFF test
  Phaser 6250DP no EFF test
  Phaser 6350DP no EFF test
  Phaser 7300DN no EFF test
  Phaser 7300DT no EFF test
  Phaser 7700 no EFF test
  Phaser 7750DN no EFF test
  Phaser 8200DP no EFF test
  Phaser 8200DX no EFF test
  Phaser 8400 no dithering?
  Phaser 8400B unclear dithering?
  Phaser 8400DP unclear dithering?
  Phaser 8400DX unclear dithering?
  Phaser 8400N unclear dithering?
  Phaser 8440DP unclear dithering?
  Phaser 8550 no EFF test
  Phaser 8550DP no EFF test
  Phaser 8560MFP/D no EFF test
  WorkCentre M24 yes EFF test
  WorkCentre Pro (all
models)

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