CubeHash: a simple hash function

CubeHash prizes

• I'm not interested in "attacks" that are slower than brute force for the same cost of cryptanalytic hardware; those aren't breaks.
• Breaking smaller b's wins bonus points.
• Breaking larger r's wins bonus points.
• New ideas win bonus points.
• Early posting wins bonus points. Don't hold back!

I encourage other designers to offer similar prizes for their own designs. Cryptanalysts are doing a huge amount of work for the community and deserve more gratitude than they're getting today.

2008.12.01: The 2008.11 prize has been awarded to Jean-Philippe Aumasson, Willi Meier, Maria Naya-Plasencia, and Thomas Peyrin for their paper "Inside the Hypercube" dated 2008.11.24.

I offer a new prize of 100 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2008.12).

2009.01.01: The 2008.12 prize has been awarded to Wei Dai for his paper "Collisions for CubeHash1/45 and CubeHash2/89."

I offer a new prize of 100 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.01).

2009.02.04: The 2009.01 prize has been awarded to Eric Brier and Thomas Peyrin for their paper "Cryptanalysis of CubeHash" posted 2009.01.26.

I offer a new prize of 100 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.02) with the subject line "2009.02 CubeHash prize entry".

2009.03.05: The 2009.02 prize has been awarded to Eric Brier, Shahram Khazaei, Thomas Peyrin, and Willi Meier for their paper "Collision attack on CubeHash-3/64" posted 2009.02.28.

I offer a new prize of 100 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.03) with the subject line "2009.03 CubeHash prize entry".

2009.04.05: The 2009.03 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 200 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.04) with the subject line "2009.04 CubeHash prize entry".

2009.05.04: The 2009.04 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 300 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.05) with the subject line "2009.05 CubeHash prize entry".

2009.06.08: The 2009.05 prize offer has ended without being awarded. There was an entry, but the entry is stating a previously known attack and therefore does not qualify as cryptanalysis.

I offer a new prize of 400 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.06) with the subject line "2009.06 CubeHash prize entry".

2009.07.02: The 2009.06 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 500 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.07) with the subject line "2009.07 CubeHash prize entry".

2009.08.10: The 2009.07 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 600 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.08) with the subject line "2009.08 CubeHash prize entry".

2009.09.05: The 2009.08 prize has been awarded to Eric Brier, Shahram Khazaei, Willi Meier, and Thomas Peyrin for their paper "Linearization Framework for Collision Attacks: Application to CubeHash and MD6".

I offer a new prize of 100 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.09) with the subject line "2009.09 CubeHash prize entry".

2009.10.01: The 2009.09 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 200 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.10) with the subject line "2009.10 CubeHash prize entry".

2009.11.11: The 2009.10 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 300 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.11) with the subject line "2009.11 CubeHash prize entry".

2009.12.09: The 2009.11 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 400 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2009.12) with the subject line "2009.12 CubeHash prize entry".

2010.01.12: The 2009.12 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 500 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to during the next month (2010.01) with the subject line "2010.01 CubeHash prize entry".

2010.05.09: The 2010.01 prize has been extended and awarded to Shahram Khazaei, Simon Knellwolf, Willi Meier, and Deian Stefan for their paper "Improved linear differential attacks on CubeHash".

I offer a new prize of 100 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to by 2010.06.30 with the subject line "2010.06 CubeHash prize entry".

2010.07.02: The 2010.06 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 200 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to by 2010.08.31 with the subject line "2010.08 CubeHash prize entry".

2010.09.10: The 2010.08 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 300 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to by 2010.09.30 with the subject line "2010.09 CubeHash prize entry".

2010.10.22: The 2010.09 prize offer has ended without being awarded; there were no entries.

I offer a new prize of 500 Euros for the most interesting CubeHash cryptanalysis whose PDF's public URL is sent to cubehash at box cr yp to by 2010.11.30 with the subject line "2010.11 CubeHash prize entry".

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