[crypto] [Fwd: [risc-list] RISC at CWI (Feb 18): Cryptanalysis]

[R. Hirschfeld]

---------------------------- Original Message ----------------------------
Subject: [risc-list] RISC at CWI (Feb 18): Cryptanalysis
From:    "Serge Fehr" <Serge.Fehr at cwi.nl>
Date:    Wed, February 5, 2014 15:09
To:      risc-list at cwi.nl
--------------------------------------------------------------------------

Dear Colleagues,

we cordially invite you to a special RISC seminar on

                                 *Cryptanalysis*

The seminar will take place at CWI Amsterdam, The Netherlands, on

                            *Tuesday, February 18, 2014, in Room L017*

starting at 14:00h . The program features talks by Orr Dunkelman (Haifa
University, Israel), Maximilian Fillinger (CWI Amsterdam), and Marc
Stevens (CWI Amsterdam). The schedule is as follows.

  14:00 - 14:45 h       Marc Stevens: Update on cryptanalysis &
counter-cryptanalysis of SHA-1
  14:45 - 15:30 h       Maximilian Fillinger: Reconstructing the
Cryptanalytic Attack behind the Flame Malware
  16:00 - 16:45 h       Orr Dunkelman: Meet in the Middle Attacks
  16:45 - 17:30 h       Orr Dunkelman: Meet in the Middle Attacks - The
Next Generation

See below and/or the RISC web page http://www.cwi.nl/crypto/risc.html
for the abstracts.

See you then and there!

Best regards,
Ronald Cramer and Serge Fehr


----------------------------------------------

Orr Dunkelman: *Meet in the Middle Attacks*

Abstract: In this talk we shall discuss the meet in the middle technique
that was introduced by Merkle & Hellman in their seminal paper that
showed that Double-DES is not more secure than single DES. Their
technique was later used by Chaum & Evertse to attack reduced-round
variants of DES. While being left out for several years, the technique
is recently enjoying a renaissance, and become an active research field,
with application to many block ciphers.
Joint work with Itai Dinur, Nathan Keller, and Adi Shamir.

Orr Dunkelman: *Meet in the Middle Attacks - The Next Generation*

Abstract: In this talk we shall discuss some of the new results on meet
in the middle attacks, and mainly the recent work by Dinur et al. We
will cover the new and surprising results in the field of the meet in
the middle attacks, that can be applied to a much larger range of
problems than multiple encryption.
Joint work with Itai Dinur, Nathan Keller, and Adi Shamir.

Marc Stevens: *Update on cryptanalysis & counter-cryptanalysis of SHA-1*

Abstract: Collision attacks on SHA-1 are for a major part based on
combinations of local collisions.
At EUROCRYPT'13 we introduced a new exact and holistic method to analyze
combinations of local collisions
that takes dependencies between them fully into account.
This talk will discuss current work in extending this work to the
remaining part of collision attacks
towards improved SHA-1 collision attacks.
We also discuss how this method can be applied in the
counter-cryptanalysis of SHA-1
to significantly speed up the collision detection algorithm for SHA-1.

Maximilian Fillinger: *Reconstructing the Cryptanalytic Attack behind
the Flame Malware*

Abstract: The cyberwarfare malware Flame was, among other things,
notable for its
ability to spread inside local networks via Windows Update, disguised as
a security update from Microsoft. Using a chosen-prefix collision
attack, based on differential cryptanalysis, on the cryptographic hash
function MD5, the attackers obtained a certificate in Microsoft's PKI
which they used to sign the update. Even though the attackers created a
new variant collision-attack, it has some similarities to MD5 collision
attacks that can be found in the literature. We attempt to reconstruct
the collision attack and the underlying differential path families and
illustrate our reconstruction techniques on example.
Joint work with Marc Stevens

----------------------------------------------


_______________________________________________
risc-list mailing list
risc-list at cwi.nl
https://lists.cwi.nl/mailman/listinfo/risc-list