Leonard Rosenthol

Results 142 comments of Leonard Rosenthol

@HinTak as Adobe's PDF Architect and chair of ISO TC 171/SC 2, where PDF is standardized (as ISO 32000), I am well aware of how things work with fonts and...

@tiroj Yes, all X.509-based digital signature technology has its trust model rooted in Certificate Authorities. It's the same technology used to secure web sites and documents, so I would expect...

@davelab6 Absolutely! >@lrosenthol do you have any pointers to existing rebuttals against claims that C2PA is a DRM system? In the Security Considerations document (https://c2pa.org/specifications/specifications/1.0/security/Security_Considerations.html#_security_model), under _Confidentiality_ it very clearly...

@HinTak I am not sure who a "font owner" is. In my view of fonts, there are font authors/creators. These authors/creator would most likely be the one who has the...

Modern key management actually keeps the key safe in an HSM (Hardware Security Module, https://en.wikipedia.org/wiki/Hardware_security_module) and it is accessed as part of some form of server-based software process. This is...

The right answer to this, as it is for SVG proper, is to rely on CSS-Color-4 (https://www.w3.org/TR/css-color-4/) as the way to specify non-sRGB colors (be they CMYK, ICC, etc)

@Lorp asked: >How are CMYK images processed in general? If I add a CMYK JPEG to an Illustrator file or a Google doc, how is it rendered on various output...

@PeterConstable wrote: >I suspect most software that process images would convert the image-internal CMYK representation into an RGB-based reference colour space, at least for on-screen viewing. Not necessarily RGB, but...

Sorry @PeterConstable you are correct, bad choice of words. I did indeed mean that any colorspace (and its associated color values) that can be specified with CSS-Colors should be allowed...