Introduction: Cryptex

Just like in the Da Vinci Code. It works much like a bicycle combination lock and if one arranges the rings to spell out the correct password, the rings align to unlock it, and the entire cylinder slides apart. In the inner compartment of the cryptex, this is where secret information can be hidden.

This was sorta a school project. For an engineering project we had to invent something.

Step 1: Materials

-(2) 2" PVC end caps
-(1) 1.5" PVC coupler
-(1) 1.5" PVC tubing (about 7")
-(1) 2" PVC tubing (about 7")
-(3) .5" x 5" x .125" clear acrylic strips
-Dremel Tool
-Superglue

Step 2: Cutting

Cut the 2" PVC tubing into:
-(2) 2 1/8" pieces
-(5) 3/4" pieces

Step 3: Sanding

Sand down the insides of the 2" PVC rings and also the inside/outside of the coupler, until it fits snuggly inside the 2" PVC ring. Do this 4 more times. Then cut a 1/2" notch in the 1 1/2" coupler, then glue to the inside of the 2" PVC ring.

Step 4: Glue and Cut

Glue one of the 2 1/8" piece of the 2" PVC into the end cap, glue the 1 1/2" PVC to the other end cap. Then slide the 2" piece into the end cap but DO NOT glue.

Cut a 2 1/4" x 1/2" piece of PVC, then glue it onto the 1 1/2" PVC tube

Step 5: Password

Next you must decide what you want your password to be, then put the letters of the word you chose above the notch, then complete the rest of the alphabet on the ring, then slide the rings onto the 1 1/2" PVC tube.

But also make sure that you can create a riddle or something with your password. Mine was PIANO, and the riddle was.. i am a box that holds keys without locks, but can unlock your soul. What am i?

Step 6: Finishing Touches

Just Put the other end cap on and glue on the acrylic strips. But only glue them onto the 2" PVC pieces that are in the end caps. And there you go, a cryptex!

Comments

author
sueman2 made it! (author)2013-09-10

this is sorta hard to follow, i am not sure what is the key or what is the point of the clear pieces on top. could you make a video of you going over opening it and explaining more about everything.

author
Halphinian made it! (author)2013-04-02

why is there a dictionary in the picture??????

author
h.bogart made it! (author)2011-07-09

The coupler is holding the rings in place, right? idk : /

author
paperairplanecreator made it! (author)2011-06-18

i bought all the materials. Tried to make this for weeks. what do i get? 20$ gone out of my pocket, and wasting 2 weeks of my life. T_T

author
Luxordo5 made it! (author)2010-06-18

It took me awhile to realize what you meant by "get your mind out of the gutter" I probably wouldnt have realized if you didnt mention it, should I be embarrassed?

author
akinich made it! (author)akinich2010-06-18

WHAT DOES IT MEAN ?????

author
SterLuMan made it! (author)SterLuMan2010-08-15

well dude look at the pic and think... what does it remind you of?

author
akinich made it! (author)akinich2010-08-22

pipe???

author
SterLuMan made it! (author)SterLuMan2010-08-23

Dude how old r u?! 5?!

author
akinich made it! (author)akinich2010-08-31

pvc? will somebody just tell me what it means

author
SterLuMan made it! (author)SterLuMan2010-09-02

it starts with p, has 5 letters, boys have it, girls dont...

author
Dumchicken made it! (author)Dumchicken2011-03-08

i know

author

just shuttup please!

author
SterLuMan made it! (author)SterLuMan2010-11-16

Oh jeez... Are you really that superficial? And it's 'shut up', not 'shuttup'...

author

I don't care! Just please, shut up!

author
SterLuMan made it! (author)SterLuMan2010-09-30

have you got it yet?!

author
josh1324 made it! (author)josh13242010-09-29

lol seriously?

author
kooldoode made it! (author)kooldoode2010-08-31

no, close its another p word,

author

I DONT Know!!!!!

author
jeroenenmarloes made it! (author)2010-01-03

Great project. I used rivets to make the cryptex thougher to crack. In stead of one small stripe of plastic at the end, use rivets under every letter. See the pictures attached.

! the sanding of the tube is done best with an electric grinding wheel.

IMAG0115.jpgIMAG0018.jpg
author
sulis96 made it! (author)sulis962010-01-26

 do you have an instuctables on this of your own ?????? if you do could you E-mail me how to make one your way 

E-mail: TightJoker@gmail.com


author
jeroenenmarloes made it! (author)jeroenenmarloes2010-01-27

Dear sulis96,

If you follow exactly the instructions in the instructable you have 80% of the result. You need to be alert in step 4: Glue and Cut.

Instead of :"Cut a 2 1/4" x 1/2" piece of PVC, then glue it onto the 1 1/2" PVC tube."
Each "ring" consists of an outer and inner ring. The inner ring is smaller +/- 1/4". This space is enough for the rivet. If you place ring for ring on the cryptex and sign it, draw a line as seen in the firt photo, its jhust a matter of drilling and nailing. 

I hope with this information you have enough for building the cryptex.

author
sulis96 made it! (author)sulis962011-01-18

it has thanks again bra ;)

author
LiMiT-L3sS made it! (author)LiMiT-L3sS2010-04-20

dude do u hav a instuctabl fr dis its so sick

author
jeroenenmarloes made it! (author)jeroenenmarloes2010-04-21

hey death kid,

unusual nick by the way.... if you follow this instructable then you will end up like mine. All you have to do extra
is use rivets.

author
hornbadoing made it! (author)hornbadoing2010-02-22

 pleas make a video on youtube on how to make a cryptex the way u did

author
jeroenenmarloes made it! (author)jeroenenmarloes2010-02-22

 Dear hornbadoing,

I already made the crypto. So a video is only possible if I rebuild it. I don't have the time right now. Perhaps in the future.

 

author
boston09 made it! (author)boston092010-01-03

i like it! thanks for the advice

author
Quintonio made it! (author)2011-01-11

what does it mean by notch like it starts at one end and goes to the other

author
NicOmbra made it! (author)2010-12-16

Because of the length pvc pipe is sold in, maybe you could make lots of these, then have the riddles to one cryptex inside another cyptex.

author
MITisNOTHINGtoME made it! (author)2010-11-14

You didn't mention that little piece of white paper or plastic of some sort. It seems like, reading through your instructable that that is the mechanism. Please go more in depth.

author
starfox384 made it! (author)2010-08-29

love the riddle

author
Kaelessin made it! (author)2010-07-28

Hey! I liked your idea so much that I ported it over to an all copper design. Had to do some tweaking to make it work properly but enjoyed what I feel great results! I changed the design somewhat so that all letters need to be lined up to crack it (as opposed to a "brute force method" possible design)

Here is mine.

Thanks for this ible!

author
jediking14 made it! (author)2010-05-20

What you gave us your password... Nooooooooooo.

author
rennboyz made it! (author)2009-09-18

nice riddle!!!

author
greymatter21 made it! (author)greymatter212010-04-26

dido dat!(i suc at riddles>.<)

author
ampeyro made it! (author)2009-06-18

it's good, but do u think is posible to put an acid(or ink) container like it was no the movie(the acid tube was for if someone tryed to broke it)

author
papalevies made it! (author)papalevies2009-06-18

Well if breaching the device is in the picture, you could use a tiny hole and a syringe to drain out the acid, or even cut around the wall/lock and take the paper out. Also, low power explosives would be safer than acid.

author
Pie Ninja made it! (author)Pie Ninja2009-06-18

You use a mild acid, like vinegar, to wash away the ink.

author
ph34rsoldier made it! (author)ph34rsoldier2009-10-17

But if you use regular paper than the vinegar will jus wash the ink away and leave the pen/pencils indentaion in the paper. So for vinegar to work you would need to use papyrus which fully dissolves the paper.

author
LiMiT-L3sS made it! (author)LiMiT-L3sS2010-04-20

u can laminate it

author
instructables12354 made it! (author)instructables123542009-11-21

maybe that would work if you used pen ink and painted the words on so when it washed off there would be no indentation?

author
ph34rsoldier made it! (author)ph34rsoldier2009-11-25

then you would have to be an expert painter because when u paint the paper soaks the moisture and if u put a lighter behind it it will show

author
ampeyro made it! (author)ampeyro2009-06-21

what i wanted to use is any solvant that solves the ink, or the same ink of the text

author
zimmemic25 made it! (author)zimmemic252009-08-07

if u use the same ink like the text, then someone can pour sand on the paper, and it will collect where the pen did press the paper on time of writing the text.

author
Xerillum made it! (author)Xerillum2009-10-31

 You could use a small piece of elemental sodium in oil (or another method of creating a flame, this is just the first thing I thought of), and write the message on flash paper. When the sodium is exposed to air, it ignites the flash paper.

author
ampeyro made it! (author)ampeyro2009-11-03

it's a really good idea, but sodium is difficult to find, maybe a cylinder of permanganate inside another of glycerin and a pendrive inside it

author
LiMiT-L3sS made it! (author)LiMiT-L3sS2010-04-20

wat abot  sodium cloride

author
pyra_builder_1337 made it! (author)pyra_builder_13372009-12-07

i may be you would have to have the sodium /oil in water its reactive to water

author
Silence made it! (author)Silence2009-06-18

The acid was contained in a thin glass container and the parchment wrapped around it. if the cryptex was tampered with violently (or dropped) then it risked destroying both the glass container and the parchment as a result. To maybe add pick proofing with that, a mechanism to clamp the glass could be added if the cryptex is pulled apart without setting the rings correctly it would risk crushing it thus spilling the acid.

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