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@ -172,7 +172,7 @@ pay to contract, and client-side validation.
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[[single_use_seals]]
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==== Single-Use Seals
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Single-use seals originate in physical security. Someone shipping an
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Single-use seals ((("colored coins application", "single-use seals")))((("single-use seals")))originate in physical security. Someone shipping an
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item through a third party needs a way to detect tampering, so they
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secure their package with a special mechanism that will become clearly
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damaged if the package is opened. If the package arrives with the seal
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