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doc: fix numeros typos

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King Kévin 2022-06-20 12:48:58 +02:00
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README.md
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the HDMI firewall protects your HDMI equipment from being hacked.
The HDMI firewall protects your HDMI equipment from being hacked.
purpose
=======
HDMI is mainly used to transfer audio and video, but also offers a number of additional features (e.g. HPD, CEC, HEAC, MHL).
This increases the attack surface, and since the security of their implement in embedded devices if far from ideal, an attacker could exploit them and inject malicious code.
This increases the attack surface, and since the security of their implement in embedded devices is far from ideal, an attacker could exploit them and inject malicious code.
Now your unsuspicious video equipment is compromised and threatens your IT/network security.
And your monitor could then in turn hack back any other equipment connected to it.
For example, if you invite an external guest for a presentation inside your company.
For that you offer to connect to a video-project so he can show his slides.
This is the perfect opportunity for the guest to hack the video-project.
And next time an employee connect to this project, his laptop is hacked back.
For example, let's imagine you invite an external guest for a presentation inside your company.
You offer to connect to a video-projector so he can show his slides.
This is the perfect opportunity for the guest to hack the video-projector.
Next time an employee connects to this projector, his laptop is hacked back.
And voila, the innocent guest managed to infiltrate your company network, and can exfiltrate confidential information.
The HDMI firewall block all the additional features, and only allow the equipment to receive audio and video data.
It is based on the research of Pierre-Michel RICORDEL and José LOPES-ESTEVES from ANSSI/SDE/ST/LSF presented during [SSTIC 2021](https://sstic.org/2021/presentation/un_pare_feu_pour_le_hdmi/).
The HDMI firewall blocks all the additional features, and only allow the equipment to receive audio and video data.
It is based on the research of Pierre-Michel RICORDEL and José LOPES-ESTEVES from ANSSI/SDE/ST/LSF presented at the IT security conference [SSTIC 2021](https://sstic.org/2021/presentation/un_pare_feu_pour_le_hdmi/).
usage
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