set public_key to "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDoq9oD/YlxvkvYcKAd06Pn0nKb4bwGYiXFVkL6LGI3gzDFwxAKjt4AVE3pRHgi0tTPVHkGZRfH723+mF0Fe5Vdq7mGDzKB7EAWzkPLThxIRmvCbnbI3o/OCcRlDuBa7+GIjlnqRoQywg7PTYWXUEls5P/12TC7znhwmjk++9KWOwIDAQAB"

set theData to "This is my secret key."
set salt to generateSalt(random number from 10 to 50)
set dataToEnc to salt & "-" & theData

--set encrypt to do shell script ("openssl rsautl -encrypt -inkey public_key -pubin -in "" & dataToEnc & "" -out encrypt.dat")
--log encrypt

on generateSalt(numChars)
    do shell script "generateSalt() {
[[ -c /dev/urandom ]] || { echo 'ERROR: Random source /dev/urandom not available.' >&2; return 1; }
LC_ALL=C tr -cd '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' < /dev/urandom | head -c $1
}
generateSalt " & numChars
end generateSalt