This is almost the same as Digest::HMAC, except that it uses the same $secret for each hash computation.

The choice of an empty string in the join is not good, though. Do you really want to produce the same authenticator for these two inputs? 

@fields1 = ( "foobar", "baz" );
@fields2 = ( "foo", "barbaz" );

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In reply to Re^2: Is this a secure way to prevent cookie tampering by Anonymous Monk
in thread Is this a secure way to prevent cookie tampering by EvdB

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