I need code to generate 64 character key from combination of my two inputs(having 12 digits each)

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Hi..I need code to generate 64 character key from the combination of my two inputs(having 12 digits each).And that 64 character output should be unique..if i give the same inputs again the out also should be same..
It is possible please give solution..

Posted 8-May-14 21:47pm

Manivignesh

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King Fisher 9-May-14 3:49am

We are not Providing any code .What you have Tried First?

2 solutions

Solution 2

Probably the best way to do this would be to use a hashing function: SHA256 produces a 256 bit output regardless of the input length, which equates to a 64 hex digit (ie 64 printable characters) output.

See here: SHA256 Class[^]

Posted 8-May-14 22:03pm

OriginalGriff

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CPallini · Accepted Answer · 2014-05-08T22:02:00

Solution 1

Any deterministic algorithm would do the trick. For instance simply concatenating the input keys would work:

C#

string k1 = "123456789012";
string k2 = "135792468013";
string kr = k1 + k2 + k1 + k2 + k1 + k2.SubString(0,4);

Posted 8-May-14 22:02pm

CPallini

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Manivignesh 9-May-14 7:37am

ok thanks for the code...one more clarification... if i give only one input(12 digit string) i want 64 character unique key..so can you give the solution

CPallini 9-May-14 8:16am

That's just a dumb example. However it would be enough to replace every occurrence of k2 with k1 in the third line.

Manivignesh 9-May-14 9:05am

Thanks buddy...

CPallini 9-May-14 9:08am

You are welcome.

Matt T Heffron 9-May-14 13:17pm

UNLESS omitting k2 is DIFFERENT from omitting k1 ;-)

CPallini 9-May-14 15:30pm

Nope, it works anyway (the OP asked for an algorithm based on a single key).

Matt T Heffron 9-May-14 19:22pm

Getting pedantic here ;-)
OP asked "...combination of my two inputs"
So dealing with either of the two inputs being blank (scope creep) may or may not depend on which is blank (incomplete requirements!)
Another solution is to use a non-numeric substitute for a blank input.
It cannot be the same as any valid (numeric) input, and the uniqueness of WHICH input was blank is preserved.
Just random thoughts...

CPallini 10-May-14 6:28am

OK, I got it.