entropyseal.com/

Neat tamper-evidence packaging concept: a random pattern of beads that's modified when you open the package, along with a smartphone app to automatically verify the pattern is correct.

Reusable glitter basically: to fake a seal, you need to make the significant effort of positioning each bead in the right place. Possible. But very time consuming.

I'd buy one!

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@pete

hey all, i built both the vaccum TEP of shiftcrypto and the entropyseal.
apologies we have not yet published a video that clarifies some of the assumptions discussed here.

@giszmo - freezing attack is indeed not easily doable thanks to the protrusions, which we call pins, locking the entire system if the particles are frozen.

@giszmo - not friction makes cap insert rotate against the cap. there are teeth, actually heavy duty teeth that prevent from twisting the jar open without opening the particle insert into a loose state forcefully.

@kekcoin - slow and careful will still disturb the pattern due to pins inside cap and also from the other side of the insert. upside down opening does also not do the trick.

@jgettbtc - the design is foreseen in transparent polycarbonate, the locked particles should survive a simple drop easily. after all the design is made to be shipped internationally in locked state. thick tempered glass would be an option for the jar but would increase cost a bit.

@121
- love the idea of russian doll style. tough that would need two initial sizes and injection mold tooling is quite a cost factor.

@pete
- the vacuum tep's main security was not the bag but the problem to pull away the velcro particle pouch from the container without disturbing the pattern.

i gladly answer any further arising questions, also via entropyseal@protonmail.com

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