1997-08-15 - Re: Getting ecash without an MTB account

Header Data

From: Mike <Michael.Johnson@mejl.com>
To: Jeremey Barrett <cypherpunks@toad.com
Message Hash: e245b1e4c6fe431b2179c43235333b5200790b6218fd9fb4a18703d1cfd9a846
Message ID: <>
Reply To: <>
UTC Datetime: 1997-08-15 13:07:12 UTC
Raw Date: Fri, 15 Aug 1997 21:07:12 +0800

Raw message

From: Mike <Michael.Johnson@mejl.com>
Date: Fri, 15 Aug 1997 21:07:12 +0800
To: Jeremey Barrett <cypherpunks@toad.com
Subject: Re: Getting ecash without an MTB account
In-Reply-To: <>
Message-ID: <>
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Jeremey Barrett wrote:
>BTW, there are better solutions to operating without a mint account,
>but they are not widely available yet.

Are you referring to the receiver anonymous protocol?

This is how I understand that protocol,

Alice wants to receive e$1 from Bob. She creates a random number, blinds
it, and gives the blinded number to Bob. He shows the number to the
Mint, asking for a withdrawal of e$1 with a signature on this coin
number. Bob gives the signed and still blinded coin to Alice. She
unblinds it and spends it, end of story.

I thought that in this scenario, Bob can spend the coin before he gives
it to Alice, so she runs the risk of receiving a coin that has already
been spent. Is it impossible to spend a blinded coin if you can't
unblind it? Or are you thinking of something totally different?

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