I have a number generator, that takes in 16 characters, and then generates a serial number.

The following are the sequences generated by this number generator:

Please enter a 16 character string to generate:
1234567890123456
Your Serial key is: 1751540834-1886284906-1684168818-1818912870



Please enter a 16 character string to generate
1111111111111111
Your Serial key is: 1650614882-1650614882-1650614882-1650614882

Please enter a 16 character string to generate
2222222222222222
Your Serial key is: 421075225-421075225-421075225-421075225



Please enter a 16 character string to generate
0987654321234567
Your Serial key is: 463215768-429529755-429463705-463149722

Please enter a 16 character string to generate
qwertyuiopasdfgh
Your Serial key is: 3838504674-884653242-3871531230-875803442


Please enter a 16 character string to generate
mnbvcxzasdfghjkl
Your Serial key is: 3972324570-3270832326-3469527270-909489460


Given the following sequences, what will be my 16 character string to generate the serial number "851122601-565353145-976764089-3706359006" ?

Reverse Engineering, where are the Mathematicians

sleepingdemon:
using php, i would do the following
<?php
$characters=1111444411111111;
//check if character lengthis 16
$num_length = strlen((string)$characters);
if($num_length !=16){
//throw error and probably return
}else{
//divide the number into 4 sections
$numbee=substr($characters, 0, 4);


$num=substr($characters, 4, 4);

$num2=substr($characters, 8, 4);
$num3=substr($characters, 12, 4);
//generate serial number
$first_part=rand($numbee, ($numbee+4000000));
$second_part=rand($num, ($numbee+4000000));
$third_part=rand($num2, ($numbee+40000000));
$fourt_part=rand($num3, ($numbee+40000000));

//make all parts of the serials long
$seria11=$first_part.rand(1000, 90000);
$seria12=$second_part.rand(1000, 90000);
$seria13=$third_part.rand(1000, 90000);
$seria14=$fourt_part.rand(1000, 90000);
//cut each part of it to give 10 charcters only

$serial_final1=substr($seria11, 0, 10);
$serial_final2=substr($seria12, 0, 10);
$serial_final3=substr($seria13, 0, 10);
$serial_final4=substr($seria14, 0, 10);
//print out the generated serial number
$final=$serial_final1.'-'.$serial_final2.'-'.$serial_final3.'-'.$serial_final4;
echo "your serial key is: ".$final;
}
?>
after all of this, be sure to replace the character variable with the source of your serial number

using php, i would do the following

<?php
$characters=1111444411111111;
//check if character lengthis 16
$num_length = strlen((string)$characters);
if($num_length !=16){
//throw error and probably return
}else{
//divide the number into 4 sections
$numbee=substr($characters, 0, 4);


$num=substr($characters, 4, 4);

$num2=substr($characters, 8, 4);
$num3=substr($characters, 12, 4);
//generate serial number
$first_part=rand($numbee, ($numbee+4000000));
$second_part=rand($num, ($numbee+4000000));
$third_part=rand($num2, ($numbee+40000000));
$fourt_part=rand($num3, ($numbee+40000000));

//make all parts of the serials long
$seria11=$first_part.rand(1000, 90000);
$seria12=$second_part.rand(1000, 90000);
$seria13=$third_part.rand(1000, 90000);
$seria14=$fourt_part.rand(1000, 90000);
//cut each part of it to give 10 charcters only

$serial_final1=substr($seria11, 0, 10);
$serial_final2=substr($seria12, 0, 10);
$serial_final3=substr($seria13, 0, 10);
$serial_final4=substr($seria14, 0, 10);
//print out the generated serial number
$final=$serial_final1.'-'.$serial_final2.'-'.$serial_final3.'-'.$serial_final4;
echo $final;
}
?>

after all of this, be sure to replace the character variable with the source of your serial number

in java gui

JTextField.Text=random.Next(1,9)

Random generator = new Random();

JOptionPane.showMessageDialog( generate);

it Is just for me to place the button and textfield in jframe .

I was able to create a serial generator in c#

SleepingDemon

This is the question "Given the following sequences, what will be my 16 character string to generate the serial number "851122601-565353145-976764089-3706359006" ?"

proxy20:
in java gui

JTextField.Text=random.Next(1,16)

Random generator = new Random();

JOptionPane.showMessageDialog( generate);

it Is just for me to place the button and textfield in jframe .

The objective of this exercise is not to create a random generator.

If putting in a 16 character string "1234567890123456", generates a serial number "1650614882-1650614882-1650614882-1650614882", what 16 character string do I have top put in, to generate "851122601-565353145-976764089-3706359006"??

Look at the other sequences to perfect your algorithm

static void Main( string[] args ) {
var myBase16Digits = Base16Extensions. StandardBase10
// var myBase16Digits = " 1234567890123456"
// var myBase16Digits = _GenerateCustomeBase40DigitK
var g = Guid.Parse ( " 1751540834-1886284906-1684168818-1818912870" ) ;
Random random= new Random();
private const string _chars = "123456789"; //Added 1-9 private string

RandomString(int size) { char[] buffer = new char[size];
for (int i = 0; i < size; i++) {

buffer[i] = _chars[_rng.Next(_chars.Length)]; }

return new string(buffer); }




there must be a method to verify the key instead of generating random numbers .
here is my demo code . I will put it in windows form application in c# later .

provide the algorithm of how u use the 16 to get the serial number then I can reserve any serial number to its corresponding 16 digits

With all due respect, I feel this challenge is so belittling...this task is an easy face wipe.
Please come up with more demanding tasks, except you're trying to reach newbies or something..
Even a newbie will solve this by searching Google.

DanielTheGeek:
With all due respect, I feel this challenge is so belittling...this task is an easy face wipe.
Please come up with more demanding tasks, except you're trying to reach newbies or something..
Even a newbie will solve this by searching Google.

solve it.

mehn! mission impossible
cc jacob05 chinenyen

You want to find the needle in the haystack. The key used in signing the encryption. Is this a hash or a cipher? Cos its not like a looking cipher(Are all the values correct?). I noticed you posted another question like this, are you trying to reverse engineer a software?

seunthomas:
You want to find the needle in the haystack. The key used in signing the encryption. Is this a hash or a cipher? Cos its not like a looking cipher(Are all the values correct?). I noticed you posted another question like this, are you trying to reverse engineer a software?

My cryptography knowledge is cursory, so maybe I'm not the best person to respond to this... but (if indeed this is a cryptography problem), then I'm inclined to say that it looks very much like a hash.

@Topic: If it is a number generator problem, then I'm inclined to believe that there is a cipher element to this based on the fact that the OP's examples are not limited to just integers. Also, the OP's post (or it may be better to say that the way the OP presented the problem) seems to indicate the idea of a guaranteed output. For example, the OP seems to be guaranteeing that mnbvcxzasdfghjkl will result in 3972324570-3270832326-3469527270-909489460 each time. If that's the case (and if this is a number generator problem), then the solution would have to make use of a seed. But we are not given the seed in this problem.

I doubt I can solve this in any reasonable amount of time. As I said, my knowledge in this area is only cursory and for me there are a lot of unknowns. But, I am interested in seeing what others can come up with.

ChinenyeN:

For example, the OP seems to be guaranteeing that mnbvcxzasdfghjkl will result in 3972324570-3270832326-3469527270-909489460 each time. If that's the case (and if this is a number generator problem), then the solution would have to make use of a seed. But we are not given the seed in this problem.

You are right about the output being the same every time.

If I had the seed, ofcourse, it no longer becomes a challenge.

This is a reverse engineering challenge, and I have uploaded the numgen software here https://www.dropbox.com/s/tttxbtql079jd9b/numgen.exe?dl=0 . It is a CLI application, so just navigate to the directory from your command prompt and run.

You can also find the virus scan result here (so you can be rest assured I am not trying to infect you) https://www.virustotal.com/en/url/76f9f0d3d5a230a17b45e04eefb5d680068f6117760994728b179a2328e54588/analysis/1459063916/

Happy Reversing