Sounds like a Swiss watch company could use that for proving authenticity.
Company Seals are also a pretty big deal in East Asia, which are usually a red stamp. If several could be combined (e.g. CEO, CTO, CFO seals all generating a unique interference pattern), that would be a provable signature that the document is legitimate.
Company Seals are also a pretty big deal in East Asia, which are usually a red stamp. If several could be combined (e.g. CEO, CTO, CFO seals all generating a unique interference pattern), that would be a provable signature that the document is legitimate.