We could use ring signatures as access right authentication.
Each of your friends exchange pubkeys with you and each other, then you require an additional ring signature with each ecash transfer.
Meaning only your friends can transact the ecash among themselves, but nobody else can spend the ecash tokens.
Yet still there is perfect privacy among the tokens of your friends.
Max Hillebrand
npub1kl…lx3vt
2024-07-17 09:52:45
in reply to nevent1q…reg2
Author Public Key
npub1klkk3vrzme455yh9rl2jshq7rc8dpegj3ndf82c3ks2sk40dxt7qulx3vtPublished at
2024-07-17 09:52:45Event JSON
{
"id": "6a076566288eb1277dfb75d8645f990d24ea2a60508c5e927dedfed0ca6cb8a8",
"pubkey": "b7ed68b062de6b4a12e51fd5285c1e1e0ed0e5128cda93ab11b4150b55ed32fc",
"created_at": 1721202765,
"kind": 1,
"tags": [
[
"e",
"2f0df9862dce4e8c63c4c563fba88bdceb9b6bd9387c018311ee86a2ff71e7c0",
"",
"root"
],
[
"p",
"266815e0c9210dfa324c6cba3573b14bee49da4209a9456f9484e5106cd408a5"
]
],
"content": "We could use ring signatures as access right authentication. \n\nEach of your friends exchange pubkeys with you and each other, then you require an additional ring signature with each ecash transfer. \n\nMeaning only your friends can transact the ecash among themselves, but nobody else can spend the ecash tokens. \n\nYet still there is perfect privacy among the tokens of your friends. ",
"sig": "57c4d85849726b7fcee996e9506a1be1207f825127d62da005afa937fc5ba60cfe40db2fa27249061302364e766f09576903c973592497fd2fcf3ea323832a4e"
}