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      <div class="SelectMenu-list SelectMenu-list--borderless p-2" style="overscroll-behavior: contain;"> cyanocitta-cristata-cyanotephra-but- (94 solves, 464 points) Description: Solution: Flag:      </div>    </div>  </details-menu></details>
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        <div data-target="readme-toc.content" class="Box-body px-5 pb-5">          <article class="markdown-body entry-content container-lg" itemprop="text"><h1><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg>cyanocitta-cristata-cyanotephra-but- (94 solves, 464 points)</h1><h2><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg>Description:</h2>Only the ciphertext has changed from the original challenge.The Blue Jay (Cyanocitta cristata) is a passerine bird in the family Corvidae, native to North America. It is resident through most of eastern and central United States and southern Canada, although western populations may be migratory. It breeds in both deciduous and coniferous forests, and is common near and in residential areas. It is predominately blue with a white chest and underparts, and a blue crest. It has a black, U-shaped collar around its neck and a black border behind the crest. Sexes are similar in size and plumage, and plumage does not vary throughout the year. Four subspecies of the Blue Jay are recognized.output.txtcyanocitta-cristata-cyanotephra.sage<h2><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg>Solution:</h2>It's the same encryption as cyanocitta-cristata-cyanotephra but with a different output.txt, so I reused the same script.My Script:<div class="highlight highlight-source-python position-relative overflow-auto" data-snippet-clipboard-copy-content="import z3import codecsall = [(26, 66, 70314326037540683861066), (175, 242, 1467209789992686137450970), (216, 202, 1514632596049937965560228), (13, 227, 485439858137512552888191), (1, 114, 112952835698501736253972), (190, 122, 874047085530701865939630), (135, 12, 230058131262420942645110), (229, 220, 1743661951353629717753164), (193, 81, 704858158272534244116883)]a, b = 886191939093, 589140258545flag = 19440293474977244702108989804811578372332250xs = []ys = []vals = []c0= z3.Int('c0')c1= z3.Int('c1')c2= z3.Int('c2')c3= z3.Int('c3')c4= z3.Int('c4')c5= z3.Int('c5')for x in all:    xs.append(x[0])    ys.append(x[1])    vals.append(x[2])s = z3.Solver()for i in range(len(xs)):    s.add(c0 * (xs[i] ** 2) + c1 * (ys[i] ** 2) + c2 * xs[i] * ys[i] + c3 * xs[i] + c4 * ys[i] + c5 == vals[i])print(s.check())print(s.model())b2 = 14706786521482826438b3 = 2369955372216026905b4 = 4447776531968912934b5 = 14360386757903922932b1 = 8521180195499215015b0 = 11227347570319680787key = b0 * (a ** 2) + b1 * (b ** 2) + b2 * a * b + b3 * a + b4 * b + b5print(key)print(codecs.decode(hex(flag ^ key)[2:], "hex"))"><span>import</span> <span>z3</span><span>import</span> <span>codecs</span><span>all</span> <span>=</span> [(<span>26</span>, <span>66</span>, <span>70314326037540683861066</span>), (<span>175</span>, <span>242</span>, <span>1467209789992686137450970</span>), (<span>216</span>, <span>202</span>, <span>1514632596049937965560228</span>), (<span>13</span>, <span>227</span>, <span>485439858137512552888191</span>), (<span>1</span>, <span>114</span>, <span>112952835698501736253972</span>), (<span>190</span>, <span>122</span>, <span>874047085530701865939630</span>), (<span>135</span>, <span>12</span>, <span>230058131262420942645110</span>), (<span>229</span>, <span>220</span>, <span>1743661951353629717753164</span>), (<span>193</span>, <span>81</span>, <span>704858158272534244116883</span>)]<span>a</span>, <span>b</span> <span>=</span> <span>886191939093</span>, <span>589140258545</span><span>flag</span> <span>=</span> <span>19440293474977244702108989804811578372332250</span><span>xs</span> <span>=</span> []<span>ys</span> <span>=</span> []<span>vals</span> <span>=</span> []<span>c0</span><span>=</span> <span>z3</span>.<span>Int</span>(<span>'c0'</span>)<span>c1</span><span>=</span> <span>z3</span>.<span>Int</span>(<span>'c1'</span>)<span>c2</span><span>=</span> <span>z3</span>.<span>Int</span>(<span>'c2'</span>)<span>c3</span><span>=</span> <span>z3</span>.<span>Int</span>(<span>'c3'</span>)<span>c4</span><span>=</span> <span>z3</span>.<span>Int</span>(<span>'c4'</span>)<span>c5</span><span>=</span> <span>z3</span>.<span>Int</span>(<span>'c5'</span>)<span>for</span> <span>x</span> <span>in</span> <span>all</span>:    <span>xs</span>.<span>append</span>(<span>x</span>[<span>0</span>])    <span>ys</span>.<span>append</span>(<span>x</span>[<span>1</span>])    <span>vals</span>.<span>append</span>(<span>x</span>[<span>2</span>])<span>s</span> <span>=</span> <span>z3</span>.<span>Solver</span>()<span>for</span> <span>i</span> <span>in</span> <span>range</span>(<span>len</span>(<span>xs</span>)):    <span>s</span>.<span>add</span>(<span>c0</span> <span>*</span> (<span>xs</span>[<span>i</span>] <span>**</span> <span>2</span>) <span>+</span> <span>c1</span> <span>*</span> (<span>ys</span>[<span>i</span>] <span>**</span> <span>2</span>) <span>+</span> <span>c2</span> <span>*</span> <span>xs</span>[<span>i</span>] <span>*</span> <span>ys</span>[<span>i</span>] <span>+</span> <span>c3</span> <span>*</span> <span>xs</span>[<span>i</span>] <span>+</span> <span>c4</span> <span>*</span> <span>ys</span>[<span>i</span>] <span>+</span> <span>c5</span> <span>==</span> <span>vals</span>[<span>i</span>])<span>print</span>(<span>s</span>.<span>check</span>())<span>print</span>(<span>s</span>.<span>model</span>())<span>b2</span> <span>=</span> <span>14706786521482826438</span><span>b3</span> <span>=</span> <span>2369955372216026905</span><span>b4</span> <span>=</span> <span>4447776531968912934</span><span>b5</span> <span>=</span> <span>14360386757903922932</span><span>b1</span> <span>=</span> <span>8521180195499215015</span><span>b0</span> <span>=</span> <span>11227347570319680787</span><span>key</span> <span>=</span> <span>b0</span> <span>*</span> (<span>a</span> <span>**</span> <span>2</span>) <span>+</span> <span>b1</span> <span>*</span> (<span>b</span> <span>**</span> <span>2</span>) <span>+</span> <span>b2</span> <span>*</span> <span>a</span> <span>*</span> <span>b</span> <span>+</span> <span>b3</span> <span>*</span> <span>a</span> <span>+</span> <span>b4</span> <span>*</span> <span>b</span> <span>+</span> <span>b5</span><span>print</span>(<span>key</span>)<span>print</span>(<span>codecs</span>.<span>decode</span>(<span>hex</span>(<span>flag</span> <span>^</span> <span>key</span>)[<span>2</span>:], <span>"hex"</span>))</div><h2><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg>Flag:</h2>flag{d8smdsx01a0}</article>        </div>    </div>
Only the ciphertext has changed from the original challenge.
The Blue Jay (Cyanocitta cristata) is a passerine bird in the family Corvidae, native to North America. It is resident through most of eastern and central United States and southern Canada, although western populations may be migratory. It breeds in both deciduous and coniferous forests, and is common near and in residential areas. It is predominately blue with a white chest and underparts, and a blue crest. It has a black, U-shaped collar around its neck and a black border behind the crest. Sexes are similar in size and plumage, and plumage does not vary throughout the year. Four subspecies of the Blue Jay are recognized.
output.txt
cyanocitta-cristata-cyanotephra.sage
It's the same encryption as cyanocitta-cristata-cyanotephra but with a different output.txt, so I reused the same script.
My Script:
flag{d8smdsx01a0}
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