#having-fun

Real friends are very rare but when you find them you’d feel life is still good to people! 😉 Thank you friends from everywhere especially the US, Canada, India, France, Sweden, Australia, Netherlands, Brazil, South Africa, and all! 😉 Sometimes you need something to take you away from all the thoughts that you have just to take a short break since your mind will not let leave you alone, for sure…

Hello friends and hello everyone who is following up with our posts a day after another. Thank you for giving us part of your time 😉 Never underestimate walking at brisk, it’s always rejuvenating! 😉 Welcome back dear friends from the US, Australia, Brazil, Qatar, France, the UK, Japan, Latvia, and Russia 😉 Slicing apples and stringing them up to dry by the fire, that’s an old way may be used…

So long as there was a crack, the wall eventually would collapse! 😉 Welcome back friends from the US, Brazil, Belgium, Hungary, Kyrgystan, and the UK 😉

Lisa said: “The News is always depressing! And if they try to give you some cheerful news, it’s mostly about dogs or cats, haha!”

Well! Cats and dogs are a nice subject to talk about; especially, when they’re playing around each other, or when…

Now it’s the time; explore your destinations! 😉 Welcome back friends from the US, France, Australia, the UK, India, Finland, Brazil, Denmark, Qatar, Japan, Germany, Latvia, Poland, and Russia 😉

Do you know what else can make you in a good mood, or give you some pleasure. I’m serious about this. 

When you take good care of yourself, going for a manicureor a pedicure (Mani or Padi), you feel…

Never underestimate walking at brisk, it’s always rejuvenating! 😉 Welcome back dear friends from the US, Australia, Brazil, Qatar, France, the UK, Japan, Latvia, and Russia

Slicing apples and stringing them up to dry by the fire, that’s an old way may be used decades ago, but people were having fun at that time, more than the fun you have right now.

How about having a fresh pat of butter and…

You got it right! You come first then the others! 😉 Welcome back dear friends from the US, Australia, Ukraine, Brazil, Serbia, Canada, Malta, Pakistan, and Palestinian Territories 😉

It’s not easy to do all what you want to do. It’s a fact!

Do you agree?

But at least you can have some fun, can you? You’ve mentioned that it was hard for you lately to have fun.

Googleposted that you can do any of…

So I was going through my gnupg keyring tonight and realized that I should probably revoke my 2048-bit pgp keys for some stronger 4096-bit variants.  I thought to myself that it might be a bit of a pain, my public key is in a few different places that I would have to look up, one of them being keybase.io.

Then I realized, I haven’t checked out their site in a long time.  I think I signed up sometime mid-2014, when they were first new and a buddy of mine sent me an invite.  I figured I would log in, see if they’ve done anything new to the site, and log off for the night.  Well, after clicking around a bit, I notice they’re advertising the fact that they are now hiring.

This: https://keybase.io/jobs takes you to a page with a couple job descriptions, and randomly placed between webpage sections are two seemingly innocuous lines of text:

"XLI VMKLX SJ XLI TISTPI XS OIIT ERH FIEV GVCTXS, WLEPP RSX FI MRJVMRKIH."

and

"Sid uubd pl qgdbuyd prtu ca ubgqcukca itmo rgod ut ygob zoyk crrkoyoi iqsza 25519."

I thought to myself, hey, they’re challenges.  I should be able to crack this.

The first cipher text is what we call a “gimmie”.  I knew it had to be a simple shift cipher (a “Caesars cipher”).  It’s all caps, and since it’s the first one on the page it’s probably the easiest (the further down you scroll, the more challenging things get, right?).  Being lazy as I am, I copied it and pasted into emacs, M-r rot13-region and got:

“KYV IZXYK FW KYV GVFGCV KF BVVG REU SVRI TIPGKF, JYRCC EFK SV ZEWIZEXVU.”

Hmm, well that’s not what I was expecting.  ROT13 is probably the most common rotation.  Ok fine, let me look at it again.

XLI VMKLX SJ XLI TISTPI XS OIIT ERH FIEV GVCTXS, WLEPP RSX FI MRJVMRKIH

Ah ha, “XLI” is repeated twice.  If I had to take a wild guess, I’d say that’s the word “THE”.  Lets check letter distances (if you are following along, verify it visually: http://en.wikipedia.org/wiki/English_alphabet):

X --> T = 22

L --> H = 22

I --> E = 22

Well, then it’s ROT-22.  Nice.  Lets crack it:

THE RIGHT OF THE PEOPLE TO KEEP AND BEAR CRYPTO, SHALL NOT BE INFRINGED.

Awesome.  I’m loving keybase.io folks already.  Crypto and the 2nd amendment, both near and dear to my heart.

Next up, the 2nd cipher text, this one is likely to be more tricky, as it was further down the page (implying more difficulty):

"Sid uubd pl qgdbuyd prtu ca ubgqcukca itmo rgod ut ygob zoyk crrkoyoi iqsza 25519."

The thing that jumps out is the “25519″.  That’s a reference to Curve25519 - an elliptic curve used in ECDH (http://en.wikipedia.org/wiki/Curve25519).  “iqsza” happens to be five letters, same with “curve”.  Also notice “crrkoyoi” is 8 long, same with “elliptic”.

What’s interesting here, is that this isn’t a Caesar cipher.  I’m still going to guess it’s some classical cipher though.  One wild guess is it’s a polyalphabetic substitution cipher, since the first challenge was a monoalphabetic substitution.

The next thing I notice, even though it’s a weak analysis, is that not all characters are represented in the ciphertext: v, x, f, and probably more, are missing.  This is weak because the ciphertext is so short (not statistically relevant), but, it’s good to know because it leaves the door open to some ciphers.

Also, notice the ciphertext contains an even number of characters (62).

If we guess this to be a digraph based cipher, we see duplicate letter digraphs appear:

si du ub dp lq gd bu yd pr tu ca ub gq cu kc ai tm or go du ty go bz oy kc rr ko yo ii qs za

If this is a playfair cipher, then the key is a natural 25-letter alphabet square.

If I head to http://rumkin.com/tools/cipher/playfair.php and paste in the cipher, (basic key/no key), we get:

The tree of liberty must be refreshed from time to time with elliptic curve 25519.

Nice!  It even rhymes.

It seems the folks at keybase.io have a great sense of humor and fun!