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I want to explain briefly how you could check this claim.
The key in Wright's">
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< p > I explained in my previous < a href = "http://francescomecca.eu/pescewanda/2016/04/17/wright-nakamoto/" > post< / a > (in italian) that the signature that Wright provided as a public proof is in fact invalid.
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I want to explain briefly how you could check this claim.
The key in Wright's < a href = "http://www.drcraigwright.net/jean-paul-sartre-signing-significance/" > post< / a > is this:< / p >
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< pre class = "code literal-block" > < span class = "nb" > -------------------------< / span > < span class = "c" > Signature File < / span > < span class = "nb" > -------------------------< / span > < span class = "c" > < / span >
2021-12-02 16:47:14 +01:00
< span class = "c" > MEUCIQDBKn1Uly8m0UyzETObUSL4wYdBfd4ejvtoQfVcNCIK4AIgZmMsXNQWHvo6KDd2Tu6euEl1< / span >
< span class = "c" > 3VTC3ihl6XUlhcU< / span > < span class = "nb" > +< / span > < span class = "c" > fM4=< / span >
< span class = "nb" > -------------------------< / span > < span class = "c" > End Signature < / span > < span class = "nb" > --------------------------< / span > < span class = "c" > < / span >
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< / pre >
< p > Now we can use some bash utilities:< / p >
< ul >
< li > base64, that translates encoded ASCII text;< / li >
< li > hexdump, that displays hexadecimal contents from the input;< / li >
< li > cut, used to remove the binary part of the input;< / li >
< li > tr, used to delete spaces and carriage return from the input;< / li >
< / ul >
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< pre class = "code literal-block" > base64 -d < < < 'MEUCIQDBKn1Uly8m0UyzETObUSL4wYdBfd4ejvtoQfVcNCIK4AIgZmMsXNQWHvo6KDd2Tu6euEl13VTC3ihl6XUlhcU+fM4=' | hexdump -C| cut -b 11-60| tr -d ' \n'
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3045022100c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce
< / pre >
< p > Let's analyze the command one by one:< / p >
< ul >
< li >
< code > base64 -d< / code > decodes the redirected string, the output is some gibberish characters so I won't display them here;< / li >
< li >
< code > hexdump -C< / code > is used with a pipe to convert to hexadecimal:< / li >
< / ul >
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< pre class = "code literal-block" > < span class = "mf" > 00000000< / span > < span class = "w" > < / span > < span class = "mf" > 30< / span > < span class = "w" > < / span > < span class = "mf" > 45< / span > < span class = "w" > < / span > < span class = "mf" > 02< / span > < span class = "w" > < / span > < span class = "mf" > 21< / span > < span class = "w" > < / span > < span class = "mf" > 00< / span > < span class = "w" > < / span > < span class = "n" > c1< / span > < span class = "w" > < / span > < span class = "mf" > 2< / span > < span class = "n" > a< / span > < span class = "w" > < / span > < span class = "mf" > 7< / span > < span class = "n" > d< / span > < span class = "w" > < / span > < span class = "mf" > 54< / span > < span class = "w" > < / span > < span class = "mf" > 97< / span > < span class = "w" > < / span > < span class = "mf" > 2< / span > < span class = "n" > f< / span > < span class = "w" > < / span > < span class = "mf" > 26< / span > < span class = "w" > < / span > < span class = "n" > d1< / span > < span class = "w" > < / span > < span class = "mf" > 4< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "n" > b3< / span > < span class = "w" > < / span > < span class = "mf" > 11< / span > < span class = "w" > < / span > < span class = "err" > |< / span > < span class = "mf" > 0< / span > < span class = "n" > E< / span > < span class = "mf" > .< / span > < span class = "err" > !< / span > < span class = "mf" > ..< / span > < span class = "o" > *< / span > < span class = "err" > }< / span > < span class = "n" > T< / span > < span class = "mf" > .< / span > < span class = "o" > /< / span > < span class = "err" > & < / span > < span class = "mf" > .< / span > < span class = "n" > L< / span > < span class = "mf" > ..< / span > < span class = "err" > |< / span > < span class = "w" > < / span >
< span class = "mf" > 00000010< / span > < span class = "w" > < / span > < span class = "mf" > 33< / span > < span class = "w" > < / span > < span class = "mf" > 9< / span > < span class = "n" > b< / span > < span class = "w" > < / span > < span class = "mf" > 51< / span > < span class = "w" > < / span > < span class = "mf" > 22< / span > < span class = "w" > < / span > < span class = "n" > f8< / span > < span class = "w" > < / span > < span class = "n" > c1< / span > < span class = "w" > < / span > < span class = "mf" > 87< / span > < span class = "w" > < / span > < span class = "mf" > 41< / span > < span class = "w" > < / span > < span class = "mf" > 7< / span > < span class = "n" > d< / span > < span class = "w" > < / span > < span class = "n" > de< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "mf" > 8< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > fb< / span > < span class = "w" > < / span > < span class = "mf" > 68< / span > < span class = "w" > < / span > < span class = "mf" > 41< / span > < span class = "w" > < / span > < span class = "n" > f5< / span > < span class = "w" > < / span > < span class = "err" > |< / span > < span class = "mf" > 3.< / span > < span class = "n" > Q< / span > < span class = "s" > "...A}....hA.|< / span > < span class = "w" > < / span >
< span class = "mf" > 00000020< / span > < span class = "w" > < / span > < span class = "mf" > 5< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "mf" > 34< / span > < span class = "w" > < / span > < span class = "mf" > 22< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "n" > a< / span > < span class = "w" > < / span > < span class = "n" > e0< / span > < span class = "w" > < / span > < span class = "mf" > 02< / span > < span class = "w" > < / span > < span class = "mf" > 20< / span > < span class = "w" > < / span > < span class = "mf" > 66< / span > < span class = "w" > < / span > < span class = "mf" > 63< / span > < span class = "w" > < / span > < span class = "mf" > 2< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "mf" > 5< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "n" > d4< / span > < span class = "w" > < / span > < span class = "mf" > 16< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > fa< / span > < span class = "w" > < / span > < span class = "mf" > 3< / span > < span class = "n" > a< / span > < span class = "w" > < / span > < span class = "err" > |\< / span > < span class = "mf" > 4< / span > < span class = "s" > "... fc,\....:|< / span > < span class = "w" > < / span >
< span class = "mf" > 00000030< / span > < span class = "w" > < / span > < span class = "mf" > 28< / span > < span class = "w" > < / span > < span class = "mf" > 37< / span > < span class = "w" > < / span > < span class = "mf" > 76< / span > < span class = "w" > < / span > < span class = "mf" > 4< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > ee< / span > < span class = "w" > < / span > < span class = "mf" > 9< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > b8< / span > < span class = "w" > < / span > < span class = "mf" > 49< / span > < span class = "w" > < / span > < span class = "mf" > 75< / span > < span class = "w" > < / span > < span class = "n" > dd< / span > < span class = "w" > < / span > < span class = "mf" > 54< / span > < span class = "w" > < / span > < span class = "n" > c2< / span > < span class = "w" > < / span > < span class = "n" > de< / span > < span class = "w" > < / span > < span class = "mf" > 28< / span > < span class = "w" > < / span > < span class = "mf" > 65< / span > < span class = "w" > < / span > < span class = "n" > e9< / span > < span class = "w" > < / span > < span class = "err" > |< / span > < span class = "p" > (< / span > < span class = "mf" > 7< / span > < span class = "n" > vN< / span > < span class = "mf" > ...< / span > < span class = "n" > Iu< / span > < span class = "mf" > .< / span > < span class = "n" > T< / span > < span class = "mf" > ..< / span > < span class = "p" > (< / span > < span class = "n" > e< / span > < span class = "mf" > .< / span > < span class = "err" > |< / span > < span class = "w" > < / span >
< span class = "mf" > 00000040< / span > < span class = "w" > < / span > < span class = "mf" > 75< / span > < span class = "w" > < / span > < span class = "mf" > 25< / span > < span class = "w" > < / span > < span class = "mf" > 85< / span > < span class = "w" > < / span > < span class = "n" > c5< / span > < span class = "w" > < / span > < span class = "mf" > 3< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "mf" > 7< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "n" > ce< / span > < span class = "w" > < / span > < span class = "err" > |< / span > < span class = "n" > u%< / span > < span class = "mf" > ..< / span > < span class = "o" > > < / span > < span class = "err" > |< / span > < span class = "mf" > .< / span > < span class = "err" > |< / span > < span class = "w" > < / span >
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< / pre >
< ul >
< li > cut -b 11-60 displays only the characters from column 11 to 60:< / li >
< / ul >
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< pre class = "code literal-block" > < span class = "mf" > 30< / span > < span class = "w" > < / span > < span class = "mf" > 45< / span > < span class = "w" > < / span > < span class = "mf" > 02< / span > < span class = "w" > < / span > < span class = "mf" > 21< / span > < span class = "w" > < / span > < span class = "mf" > 00< / span > < span class = "w" > < / span > < span class = "n" > c1< / span > < span class = "w" > < / span > < span class = "mf" > 2< / span > < span class = "n" > a< / span > < span class = "w" > < / span > < span class = "mf" > 7< / span > < span class = "n" > d< / span > < span class = "w" > < / span > < span class = "mf" > 54< / span > < span class = "w" > < / span > < span class = "mf" > 97< / span > < span class = "w" > < / span > < span class = "mf" > 2< / span > < span class = "n" > f< / span > < span class = "w" > < / span > < span class = "mf" > 26< / span > < span class = "w" > < / span > < span class = "n" > d1< / span > < span class = "w" > < / span > < span class = "mf" > 4< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "n" > b3< / span > < span class = "w" > < / span > < span class = "mf" > 11< / span > < span class = "w" > < / span >
< span class = "mf" > 33< / span > < span class = "w" > < / span > < span class = "mf" > 9< / span > < span class = "n" > b< / span > < span class = "w" > < / span > < span class = "mf" > 51< / span > < span class = "w" > < / span > < span class = "mf" > 22< / span > < span class = "w" > < / span > < span class = "n" > f8< / span > < span class = "w" > < / span > < span class = "n" > c1< / span > < span class = "w" > < / span > < span class = "mf" > 87< / span > < span class = "w" > < / span > < span class = "mf" > 41< / span > < span class = "w" > < / span > < span class = "mf" > 7< / span > < span class = "n" > d< / span > < span class = "w" > < / span > < span class = "n" > de< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "mf" > 8< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > fb< / span > < span class = "w" > < / span > < span class = "mf" > 68< / span > < span class = "w" > < / span > < span class = "mf" > 41< / span > < span class = "w" > < / span > < span class = "n" > f5< / span > < span class = "w" > < / span >
< span class = "mf" > 5< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "mf" > 34< / span > < span class = "w" > < / span > < span class = "mf" > 22< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "n" > a< / span > < span class = "w" > < / span > < span class = "n" > e0< / span > < span class = "w" > < / span > < span class = "mf" > 02< / span > < span class = "w" > < / span > < span class = "mf" > 20< / span > < span class = "w" > < / span > < span class = "mf" > 66< / span > < span class = "w" > < / span > < span class = "mf" > 63< / span > < span class = "w" > < / span > < span class = "mf" > 2< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "mf" > 5< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "n" > d4< / span > < span class = "w" > < / span > < span class = "mf" > 16< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > fa< / span > < span class = "w" > < / span > < span class = "mf" > 3< / span > < span class = "n" > a< / span > < span class = "w" > < / span >
< span class = "mf" > 28< / span > < span class = "w" > < / span > < span class = "mf" > 37< / span > < span class = "w" > < / span > < span class = "mf" > 76< / span > < span class = "w" > < / span > < span class = "mf" > 4< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > ee< / span > < span class = "w" > < / span > < span class = "mf" > 9< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "n" > b8< / span > < span class = "w" > < / span > < span class = "mf" > 49< / span > < span class = "w" > < / span > < span class = "mf" > 75< / span > < span class = "w" > < / span > < span class = "n" > dd< / span > < span class = "w" > < / span > < span class = "mf" > 54< / span > < span class = "w" > < / span > < span class = "n" > c2< / span > < span class = "w" > < / span > < span class = "n" > de< / span > < span class = "w" > < / span > < span class = "mf" > 28< / span > < span class = "w" > < / span > < span class = "mf" > 65< / span > < span class = "w" > < / span > < span class = "n" > e9< / span > < span class = "w" > < / span >
< span class = "mf" > 75< / span > < span class = "w" > < / span > < span class = "mf" > 25< / span > < span class = "w" > < / span > < span class = "mf" > 85< / span > < span class = "w" > < / span > < span class = "n" > c5< / span > < span class = "w" > < / span > < span class = "mf" > 3< / span > < span class = "n" > e< / span > < span class = "w" > < / span > < span class = "mf" > 7< / span > < span class = "n" > c< / span > < span class = "w" > < / span > < span class = "n" > ce< / span > < span class = "w" > < / span >
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< / pre >
< ul >
< li >
< code > tr -d ' \n'< / code > is used to delete spaces and carriage returns from the output so that is shown in one line and it gives us the final result:< / li >
< / ul >
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< pre class = "code literal-block" > < span class = "mf" > 3045022100< / span > < span class = "n" > c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce< / span > < span class = "w" > < / span >
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< / pre >
< p > If you noticed, there is also another cleartext string at the beginning of Wright's post:< / p >
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< pre class = "code literal-block" > $ base64 -d < span class = "o" > < < < < / span > < span class = "s1" > 'IFdyaWdodCwgaXQgaXMgbm90IHRoZSBzYW1lIGFzIGlmIEkgc2lnbiBDcmFpZyBXcmlnaHQsIFNhdG9zaGkuCgo='< / span >
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Wright, it is not the same as < span class = "k" > if< / span > I sign Craig Wright, Satoshi.
< / pre >
< p > Now let's head to blockchain.info.
Blockchain.info has a little < a href = "https://blockchain.info/decode-tx" > utility< / a > to get hexadecimal informations out of a transaction on the blockchain, so let's use it to get the related info about this transaction:< / p >
< p > < a href = "https://blockchain.info/tx/828ef3b079f9c23829c56fe86e85b4a69d9e06e5b54ea597eef5fb3ffef509fe" > tx/828ef3b079f9c23829c56fe86e85b4a69d9e06e5b54ea597eef5fb3ffef509fe< / a >
< a href = "https://blockchain.info/tx/828ef3b079f9c23829c56fe86e85b4a69d9e06e5b54ea597eef5fb3ffef509fe?format=hex" > tx/828ef3b079f9... in hexadecimal< / a > < / p >
< p > As you can see the entire output of the first bash command, that is< / p >
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< pre class = "code literal-block" > < span class = "mf" > 3045022100< / span > < span class = "n" > c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce< / span > < span class = "w" > < / span >
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< / pre >
< p > is contained in:< / p >
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< pre class = "code literal-block" > "script":"483045022100c12a7d54972f26d14cb311339b5122f8c187417dde1e8efb6841f55c34220ae0022066632c5cd4161efa3a2837764eee9eb84975dd54c2de2865e9752585c53e7cce01"
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< / pre >
< p > except for the 48 at the beginning and the 01 at the end.< / p >
< p > That is a signature hash:
this < a href = "https://en.bitcoin.it/wiki/List_of_address_prefixes" > page< / a > explains that the 48 is just a decimal prefix given to uncompressed transactions, and the 01 at the end is just a SIGHASH_ALL < a href = "https://bitcoin.org/en/glossary/signature-hash" > code< / a > that flags the end of the signature.< / p >
< h3 > So, is it a fake?< / h3 >
< p > Yes, indeed.
At the end, I ask, why would you choose anything else than the easiest and most conclusive way to prove something?< / p >
< p > < img alt = 'Wright "signs" the blockchain' src = "../../../../../wp-content/uploads/2016/satosh.jpg" > < / p >
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