CPAN has many modules for en/decryption.
These modules implement algorithms that are better then
yours, in terms of how easy breaking a message is likely
(It looks to me like yours has signifigant vunerablities,
mainly deriving from the join("1", @key3)
and possibly also deriving from mathematically properties
of the result of an xor'ing data, uuencoding it, and then xor'ing it the same way. Your algorithm is probably also
vunerable to a brute-force attack.)
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