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A comment on Hiding messages in a deck playing cards. Parent comment

Re:Hiding messages in a deck playing cards by russellbeattie on Monday July 21, 2025 @03:11PM (#44639161)
> "...which side of the whole deck is the 'top'..."

A dark line drawn across the top of the deck would be enough. Though it would ruin the stealth factor of the cards.

Also, the pattern on the back of some playing decks isn't symmetrical, so that could be used as well.

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Re:Hiding messages in a deck playing cards by istjohn on Monday July 21, 2025 @06:09PM (#44640966)
Decode it both ways and see which isn't gibberish.
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Re:Hiding messages in a deck playing cards by OkayPhysicist on Tuesday July 22, 2025 @01:52PM (#44650701)
Use a casino decommissioned deck. They typically have either a hole punched in them, or a corner cut off. Either way it won't be symmetric, but still perfectly plausible as a cheap deck of cards.
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