CE key

[mojiehai]

Does the CE key have any relation to the current dcm file?

[mojiehai]

Can the CE key be shared with me for testing purposes?

[HeadTriXz]

Does the CE key have any relation to the current dcm file?

No, it is a single encryption key used for all CE-encrypted files.

Can the CE key be shared with me for testing purposes?

Unfortunately, I don’t have permission to distribute (or access) the CE key myself, so I’m unable to share it. The only party that can provide or authorize access to the key is 3Shape. You would need to contact them directly to request it, although they generally do not share this key.

[mojiehai]

Could you please let me know if the key is 16 bytes long?

[HeadTriXz]

Could you please let me know if the key is 16 bytes long?

It is.

[mojiehai]

Hello, it seems that the texture map in CE format, PerVertexTextureCoord, is also encrypted data, right?

[HeadTriXz]

Hello, it seems that the texture map in CE format, PerVertexTextureCoord, is also encrypted data, right?

Correct. But we currently do not support textures.

[HeadTriXz]

Hi @mojiehai! Pull request #4 introduces support for extracting textures (UVs & images).

Due to a lack of testing data, I was not able to verify if it works on encrypted (CE) files with textures. Do you happen have a .hps or .dcm file with the CE schema that has textures? If so, could you verify that the pull request successfully decrypts the data and extracts the correct textures (easy to verify by using ./examples/view_hps.py).

Alternatively, if you're comfortable sharing a sample file (ensuring first that it doesn't contain any sensitive data). I’d be happy to test it myself to confirm everything works as expected.

Thanks!

[mojiehai]

The textured HPS in CE format has been sent to your email.

[mojiehai]

The UV mapping of the CC format texture seems incorrect and does not cover properly.

[HeadTriXz]

The UV mapping of the CC format texture seems incorrect and does not cover properly.

Thanks for reporting it. I haven’t been able to reproduce it yet, could you walk me through the steps or workflow you used? Screenshots or sample files would also really help.

[HeadTriXz]

Hi @mojiehai, just checking whether this is still an issue. If I don't hear back, I'll assume it's resolved and close this issue for now.