Home Forums SQL Server 2008 SQL Server Newbies SELECT question RE: SELECT question

  • December 11, 2013 at 8:19 am

    #1672651

    gary.morey (12/11/2013)

    The SSN is stored as a MD5 hashed value.

    The combination of SSN, PKT and FICE_NBR in table A does not have a match on the combination of SSN, PKT and FICE_NBR in table B.

    Ah, thanks, Gary. I feel much better now.

    Shifting gears a bit, you might want to consider something a little bit more than simple MDF hashing. A simple billion row rainbow table (which is nothing on the machines today) would quickly unravel all of the SSNs. Even adding a salt to the MD5 would be better although that would likely still fail an audit.

    --Jeff Moden

    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.

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