Surgical Files
by Zack Butler and Stephen Peters
Answer: HEMPEL
The compressed tarfile, when opened, displays a set of 18 strangely-named files. A programmer can combine these files, using simple operations, to create a set of 9 images. The same operations can also be performed on the strange filenames, to reveal the names of the image files. The resulting 9 files are:
Filename | Operation |
---|---|
beneath.tif | Take 2 bytes of '%"'t+f%{.:)<+x X7H2s F', treat it as an big-ended unsigned short, and divide it by one byte of 'ade_z[k4z{Q' |
borealis.svg | Divide 'roblae.sigvs' into four equal parts, and reverse each of them. |
bottomright.eps | Interleave the bytes in 'boge','trts', and 'otmih.p', in ABCBABC... order |
center.jpg | Reverse the middle four bits of every byte in 'GevleN6VLg' |
northeast.ppm | Add together the bytes in '2,B(+-)IJ?CDE' and '<C0L=88**%-,(' |
occidental.gif | Interleave the bytes in 'ocdna.i', with those in 'fglteic' taken in reverse order |
starboard.png | XOR together the bytes in '2B,X-5ZC.qA1.' and 'A6M*OZ;1J_1_I' |
sw.pdf | Add one to every byte in 'rv-oce', modulo 256 |
up-and-left.bmp | Take a bitwise AND of the bytes in 'uxoqolm~}nv?rmx', 'wv=i~|}mmgu>jov', and '}qmgng?ngv~oc}q' |
Taking the images and arranging them in a 3x3 grid according to the filenames gives a maze with letters on it:
Finding the correct path through the maze yields the phrase LEGO MAZEWALKER DESIGN GROUP. The Lego Mazewalker is designed by the Hempel Design Group, so the answer is HEMPEL.