Algorithm to create unique value of characters

Is there some algorithm to somehow encrypt characters into a single value for later comparison with other character sequence with the same length?
no duplicates allowed: f.e. [a,b,c] = X, where X is the result of some operation to make those characters unique.

Adding up all ascii values doesn't work: [d = 100, e = 101] and [c = 99, f = 102]. Obviously both add up to 201 with different letters.

Is there an algorithm with some operations that would make that value unique?

Thanks!
marbles

SHA1 is one algorithm that might work for you.

Viggy

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Originally Posted by marbles

Is there an algorithm with some operations that would make that value unique?

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Why not just store the characters as a string. It's a single value and it's unique.

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Originally Posted by nuzzle

Why not just store the characters as a string. It's a single value and it's unique.

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The problem is that the order doesn't matter: [a,b,c] and [b,c,a] should result in the same value. I tried generating all permutations and compare with a given string. But that gets huge the more characters there are.

Thanks

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Originally Posted by marbles

The problem is that the order doesn't matter: [a,b,c] and [b,c,a] should result in the same value.

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Just sort the strings. Then both [a,b,c] and [b,c,a] will turn out [a,b,c] and be equal.