diff options
Diffstat (limited to 'challenge.html')
| -rw-r--r-- | challenge.html | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/challenge.html b/challenge.html index 1a455a9..f94d710 100644 --- a/challenge.html +++ b/challenge.html @@ -56,19 +56,16 @@ </section> <section> - <p>Select a nonce no longer than 32 bytes, such that when it is appended to the decoded form of the challenge identifier, and the entire result is hashed with SHA-256, the first {{ .Global.NeedBits }} bits of the SHA-256 hash are all zeros. Within one octet, higher bits are considered to come before lower bits.</p> - <p>In other words, find an nonce <math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mi>N</mi><annotation encoding="application/x-tex">N</annotation></semantics></math> with <math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mo stretchy="false" form="prefix">|</mo><mi>N</mi><mo stretchy="false" form="postfix">|</mo><mo>≤</mo><mn>32</mn><mspace width="0.167em"></mspace><mi mathvariant="normal">B</mi></mrow><annotation encoding="application/x-tex">\lvert N\rvert \le 32\,\mathrm{B}</annotation></semantics></math>, such that <math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mrow><mi mathvariant="normal">S</mi><mi mathvariant="normal">H</mi><mi mathvariant="normal">A</mi><mn mathvariant="normal">256</mn></mrow><mrow><mo stretchy="true" form="prefix">(</mo><mi>I</mi><mspace width="0.167em"></mspace><mo stretchy="false" form="postfix">∥</mo><mspace width="0.167em"></mspace><mi>N</mi><mo stretchy="true" form="postfix">)</mo></mrow><mo><</mo><msup><mn>2</mn><mn>{{ .Global.NeedBitsReverse }}</mn></msup></mrow><annotation encoding="application/x-tex">\mathrm{SHA256}(I \,\|\, N) < 2^{{{ .Global.NeedBitsReverse }}}</annotation></semantics></math> in big endian, where <math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mi>I</mi><annotation encoding="application/x-tex">I</annotation></semantics></math> is the identifier provided below.</p> - <label for="identifier">Challenge identifier (read-only)</label> + <p>Find an nonce that, when appended to the following string, results in a SHA-256 hash that begins with {{ .Global.NeedBits }} zero bits.</p> <pre id="identifier">{{ .Identifier }}</pre> </section> <section> <form method="POST"> - <p>Encode your selected nonce in base64 and submit it below.</p> - <p>Please note that if your submission is successful, you will be given a cookie that will allow you to access this site for a period of time without having to complete the challenge again. By pressing the submit button, you agree to be given cookies for this purpose.</p> - <label for="nonce">Nonce</label> + <label for="nonce">Your selected nonce, base64-encoded:</label> <input id="nonce" name="powxy" type="text" /> <input type="submit" value="Submit" /> + <p>Please note that if your submission is successful, you will be given a cookie that will allow you to access this site for a period of time without having to complete the challenge again. By pressing the submit button, you agree to be given cookies for this purpose.</p> </form> </section> |