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{{Infobox coin|name=Casascius gold 1000 BTC|image=[[File:Casascius_1000_BTC_gold_round.jpg|256px]] |designer=[[Casascius]] ...

...ascius 25btc size compare.jpg|thumb|right|300px|Various views of Casascius coins]] [[File:Physbitcoinkey.jpg|thumb|right|Redeemed Casascius coin]] ...

...an be used in off-line transactions using physical representations, like [[Casascius physical bitcoins]] and [[Bitbills]], that give parties an assurance, throu ...|| The existence of lightwieight and offline transactions (e.g. Casascius Coins and Bitbills) can replace the need for conventional cash ...

...''minikey'''. This private key format was designed for and first used in [[Casascius physical bitcoins]], and is also favorable for use in QR codes. The fewer ...pport the 22-character format as well to allow redemption of old Casascius coins. Use of the 22-character format for future applications is discouraged due ...

* '''Pro:''' Simple to understand, and the coins are easy to spend. * '''Con:''' Maximum vulnerability to malware and hackers. Your coins can be stolen if your computer is compromised. ...

...he private key and an online one knows only the MPK. Transactions spending coins are ferried between the two computers via USB storage which avoids exposing ...ate keys offline and do not expose them to the computer even when spending coins. ...

'''Denarium physical bitcoins''', also called '''Denarium bitcoin coins''', are physical bitcoin coin wallets created by a Finnish Bitcoin company ...the physical bitcoin also provides an option to buy bitcoins loaded on the coins or gold bar. When you buy bitcoin with your order they will be automaticall ...

* Import private keys using SIPA, mini private key format (Casascius private keys) or xPriv from QR-codes or clipboard ...exchange that is built right into the Mycelium bitcoin wallet. Because the coins are stored locally in your wallet, the Local Trader exchange never needs to ...

...solved with hub servers that nanopayment recipients would use to announce coins currently in use to other nanopayment recipients. ...x.php?topic=62558 Sustainable nanopayment idea: Probabilistic Payments] by casascius. ...

...ld see is an inability to see received Bitcoins from a new client if those coins had participated in a previous multisig transaction. This was once informally proposed by Casascius. ...

...be a limited and scheduled release of no more than BTC 21 million worth of coins, which will be fully issued by the year 2140. ...l Bitcoins by Casascius|url=https://www.casascius.com/|publisher=Casascius Coins|accessdate=29 September 2012}}</ref><ref>{{Cite web|title=Bitbills|url=http ...

...spending transactions; they cannot tell you if you have actually received coins and in what quantity. Bitcoin's security model also requires that [[full no Currently it's of course in a novelty phase like Casascius coins (of which thousands were sold), ...