FIELD: methods and systems for cryptographic protection of data in graphical subsystems of a computing device.
SUBSTANCE: in accordance to the invention, methods for encoding of video memory content are realized, so that unsanctioned software may not obtain substantial access to it, resulting in supported confidentiality. Also, a mechanism is suggested for detecting unsanctioned access, providing a warning, when data is changed in a certain way, resulting in maintained integrity. In different variants of realization, content of overlay surfaces and/or command buffers are encoded, and/or graphic processing block is capable of working with encoded content, limiting access to content for unauthorized sides, devices or software.
EFFECT: ensured confidentiality and protection of data sent through graphic channel.
3 cl, 15 dwg, 3 tbl, 1 ann
