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nitrogen
on July 23, 2019
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Attorney general: Americans should accept security...
Unless there is some way of encrypting data all the way to the display controller I don't know about.
That's kind of what HDCP is, so it could be done on an embedded display too.
SomeOldThrow
on July 23, 2019
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IIUC you'd have to encrypt the text rendering, not the rendered text, for the message to be e2e encrypted and inaccessible through memory.
nitrogen
on July 23, 2019
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In theory you could run the decryption and rendering in the GPU (as is done for video), which would re-encrypt for display.
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That's kind of what HDCP is, so it could be done on an embedded display too.