Fwd: [Colloquia] Colloquium on Thursday, April 19, 2007

[Somebody]

Bob,

Here's another of your alley cats....


<somebody>

>Date: Fri, 13 Apr 2007 16:14:34 -0600
>From: Dan Cosper <dcosper at cs.unm.edu>
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>To: colloquia at cs.unm.edu
>Subject: [Colloquia] Colloquium on Thursday, April 19, 2007
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>
>    *Title:* POTSHARDS: Secure Long-Term Archival Storage Without
>    Encryption
>
>    *Date: *Thursday, April 19, 2007
>    *Time:* 11 am 12:15 pm
>    *Place:* ECE 118
>
>    Ethan L. Miller <http://www.cse.ucsc.edu/%7Eelm/>, University of
>    California at Santa Cruz
>
>    Modern archival storage systems either store data in the clear,
>    ignoring security, or rely on keyed encryption to ensure privacy.
>    However, the
>    use of encryption is a major concern when data must be stored an
>    indefinite period of time - key management becomes increasingly
>    difficult as file lifetimes increase, and data loss becomes
>    increasingly likely because keys are a single point of failure and
>    losing a key is
>    comparable to data deletion. Moreover, traditional systems are
>    subject to the obsolescence of encryption algorithms themselves,
>    which can
>    expose petabytes of data the instant a cryptographic algorithm is
>    broken.
>
>    To address these concerns, we developed POTSHARDS, an archival
>    storage system that addresses the long-term security needs of data
>    with very
>    long lifetimes without the use of encryption. POTSHARDS separates
>    security and redundancy by utilizing two levels of secret splitting
>    in a
>    way that allows the original data to be reconstructed from the
>    stored pieces. However, the data structures used in POTSHARDS are also
>    designed in such a way that an unauthorized user attempting to
>    collect sufficient shares to reconstruct any data will not go
>    unnoticed. An
>    evaluation of our POTSHARDS implementation shows that it stores and
>    retrieves data at 2.5-5 MB/s, demonstrates its ability to recover user
>    data given all of the pieces a user has stored across the archives,
>    and shows its ability to recover from the loss of an entire archive.
>
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--- end forwarded text

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The Internet Bearer Underwriting Corporation <http://www.ibuc.com/>
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experience." -- Edward Gibbon, 'Decline and Fall of the Roman Empire'