(xor-string string1 string2) -> string
Performs a bitwise XOR operation on string1, using string2 as a mask. For a more technical explanation, see Wikipedia's entry on XOR Ciphers.
Example:
>> (define a (xor-string "test" "test2")) :: #f
(a cannot be output to the console)
>> (xor-string a "test2") :: "test