You're talking about paper wallets.
Little printed pieces of paper with a public and private key, that act like Bitcoin "piggy banks". They're not considered "secure" because they can only be used for one outbound transaction, then the private key is exposed. But they can take as many deposits as you want.
TechNomad
npub1m6…zc9ql
2024-08-19 23:46:17
in reply to nevent1q…0fzr
Author Public Key
npub1m6nl44pn950nskkrwumq0xsjpk5gg4lj4qf9fzxheqsy947at83s0zc9qlPublished at
2024-08-19 23:46:17Event JSON
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"pubkey": "dea7fad4332d1f385ac37736079a120da88457f2a8125488d7c82042d7dd59e3",
"created_at": 1724111177,
"kind": 1,
"tags": [
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[
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"content": "You're talking about paper wallets.\n\nLittle printed pieces of paper with a public and private key, that act like Bitcoin \"piggy banks\". They're not considered \"secure\" because they can only be used for one outbound transaction, then the private key is exposed. But they can take as many deposits as you want.",
"sig": "5a60d550e017eb35ff230c3997b401701ada96caf9b41ced99231b233fc99ffc8a84065c0d848fb0de602f99f2c779164df2d0c69ca42e16e043306b6a65aac8"
}