Originally Posted by marxian

Sample contest for iPhone users:

Q1: What is Steve's last name?

Q2: Who is god? (Clue: see Q1)

Q3: Complete this phrase: Insanely _ _ _ _ _.

Q4: iPhone 5 will be:

a) Magical, b) Insanely great, c) a & b

Originally Posted by recluse

ElGamal Example (explained easier)

This scheme requires several variables.

a is a secret key less than the value of p. We will assume it is 304 since p must be greater than it.
g is the generator variable. Nokia has told us its value is 10.
p is a large prime number that Nokia have told us is >304.
For our situation, p is the most important. It is a prime number that must have 'g' as a primitive root.
For fun, we will select 2789.
m is our encrypted message (if there is one) that has to be less than p. For fun we'll choose 832 (from taxi)
k is a prime number used for encrypting the message. It also has the condition it must be less than p and gcd(k, p − 1) = 1. For fun, we will choose 15 (from truck).

So let's do it.

Generate Public Key

p = 2789; g = 10; a = 304
g^a % p = 10^304 (% 2789) ≡ 1161

Now we have what is known as a 'public key' (p, g, g^a%p).
The public key is P = (p ← 2789, g ← 10, g^a%p ← 1161), the secret key is a (304).

Encrypt Message

Next, we encrypt a message m = 832 as follows:
k = 15
γ = 10^15 (% 2789) ≡ 1063
δ ≡ 832 x 1161^15 (% 2789) ≡ 181
c = (γ ← 1063, δ ← 181)

The ciphertext, c, is then sent to the recipient.

Decrypt Message

The recipient can then calculate m from this. The message is calculated by:
m ≡ 1063^(2789-1-304) x 181 ≡ (1063^2484) x 181 (% 2789) ≡ 832

In summary -- to get your 6 digits for the competition:
Generating Public Key
<p><10><10^a % p> (6 digits)

In this situation, p is most likely 3 digits. Also, a or y is likely 15 (where else would it be used?)
This means you can get p from the list below:
313, 337, 367, 379, 383, 389, 419, 433, 461, 487, 491, 499, 503, 509, 541, 571, 577, 593, 619, 647, 659, 701, 709, 727, 743, 811, 821, 823, 857, 863, 887, 937, 941, 953, 971, 977, 983.

Generating Cipher Key
<10^k % p><m*(10^a%p)^k %p> (6 digits)

In this situation, p is most likely 4 digits.
This means Nokia has given us the p from the 'colors on the wall'.

Originally Posted by gerbick

........

Wow. **** that. I don't think I want a free N9 that much.

Originally Posted by recluse

Awesome. It's all mine then.
Even though I wrote all that, I have no clue where to start either.
I'm sure it'll be solved within a few seconds of the next clue though.

Originally Posted by biatch0

Just to update you guys, there's been invites going around to a "preview" of the N9 in Malaysia sometime soon - within the next couple of weeks. Judging from the amount of time it took for Nokia Malaysia to organize something like this for the N900 (6 months after official launch), I would assume that the N9 can't be that far off - right on track for the late August/early September launch date that's been going around on the boards for awhile.

Originally Posted by Lindegaard

I'm impressed and this was with prototype hardware and software. Everything was smooth even though alot of apps, pics, video ect were used in the background - though, as far as I understood the apps are being paused when you swipe to another app or home screen.

.

Originally Posted by zymo

not all apps are paused. take a look at this video http://www.youtube.com/watch?v=mfEEBkcTwDo

you can see that the compass app is still „working“ in the background. but the video-player for example will pause.