Epson has not published any information on protection mechanisms. prn files containing PJL commands ( ENTER LANGUAGE=DOWNLOAD). rcx files of unknown format (‘SEIKO EPSON EpsonNet Form’) and nine. efu files can be analyzed using Binwalk which extracts the actual firmware. According to email correspondence with a Canon technical support representative, ‘firmware does have to be digitally signed by Canon in order for it to be accepted by the printer’.įirmware can be downloaded from and via FTP from. According to, who were able to modify firmware for the Canon PIXMA series, ‘there is no signing (the correct way to do it) but it does have very weak encryption’. įirmware is available at Canon however requires a valid device serial number to download any firmware. This has been demonstrated by and caused HP to digitally sign all their printer firmware since March 2012.
rfu files contain proprietary PJL commands like UPGRADE SIZE=…, indicating that firmware updates are deployed as normal print jobs. rfu) format and 206 newer ‘HP FutureSmart’ binaries (.
419 files in HP's traditional remote firmware update (. The results are as follows.įirmware can be downloaded from support.hp.com or directly from ftp.hp.com via FTP. To give an overview of firmware deployment procedures 1,400 firmware files for the top 10 printer manufacturers have been downloaded and systematically categorized by.
