IMO this is the best module to deal with tainting. BTW there are several other modules like Taint (only provides taint + tainted, no untaint), Untaint (only provides untaint with awkward interface, like $v = untaint(qr/.../, $v)), Scalar::Util (only provides tainted), Test::Taint (does not provide untaint but provides taint_deeply and test predicates), and several others.
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