Personal page: Vlastimil Klima, Dr. (In Czech: Vlastimil Klíma) 

 English    Česky        

My company KNZ, s.r.o. http://www.knzsro.cz 

 

v.klima@volny.cz 

 

 

Born: on 19th February 1957, Czech Republic

Wikipedia info: is here
Education: 1976 - 1981: Charles University in Prague Faculty of Mathematics and Physics, 1984: Doctor of Natural Sciences (DSc, Charles University)
Research: Security, Cryptology
Certificate: of Security Clearance TOP SECRET
Lectures: Applied Cryptography at the Faculty of Mathematics and Physics, Charles University in Prague, 2003 - 2007
I am also co-editor of Czech crypto-news server and e-zin Crypto-world, based on 1999, ISSN 1801-2140, in Czech only: security-news, crypto-news, my papers for Crypto-world
Archives of my publications on cryptology and computer security (200 papers mainly in Czech): 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993
My former colleague, a brilliant cryptologist, Dr. Tomas Rosa has his web here. My photos: are here

Main publications:

Section: NIST SHA-3 contest and Blue Midnight Wish (team homepage, my notes and homepage):

·          Danilo Gligoroski, Vlastimil Klima, Svein J. Knapskog, Mohamed El-Hadedy, Jorn Amundsen, Stig F. Mjolsnes: Cryptographic Hash Function Blue Midnight Wish, 2nd version, Sept.15, 2009, submission package, description, presentation at the First SHA-3 Candidate Conference, Feb. 25-28, 2009

·          Danilo Gligoroski, Rune Steinsmo Odegard, Marija Mihova, Svein Johan Knapskog, Ljupco Kocarev, Aleš Drápal, Vlastimil Klima: Cryptographic Hash Function EDON-R, submission package, Jan 12, 2009, description, presentation at the First SHA-3 Candidate Conference, Feb. 25-28, 2009

·          Vlastimil Klima: Multicollisions of EDON-R hash function and other observations, November 2008, preliminary analysis

·          Vlastimil Klima: Dynamic SHA is vulnerable to generic attacks, letter, Dec. 14, 2008,

·          Vlastimil Klima: Dynamic SHA2 is vulnerable to generic attacks, letter, Dec. 14, 2008,

·          Vlastimil Klima: A near-collision attack on BLENDER, letter, official paper, Dec. 19, 2008,

·          Vlastimil Klima: Huge multicollisions and multipreimages of hash functions BLENDER-n, IACR eprint Report 2009/006, Jan. 2, 2009

·          Danilo Gligoroski, Vlastimil Klima: On the Computational Asymmetry of the S-boxes Present in Blue Midnight Wish Cryptographic Hash Function, Information on ICT Innovations 2009, Sept. 28 - 30, Ohrid, R. Macedonia

·          Vlastimil Klima and Petr Susil: A Note on Linear Approximations of BLUE MIDNIGHT WISH Cryptographic Hash Function, Cryptology ePrint Archive: Report 2009/453, Sept. 15, 2009

·          Danilo Gligoroski, Vlastimil Klima, On Blue Midnight Wish Decomposition, SantaCrypt 2009, Dec. 3-4, 2009, Prague, Czech Republic, Proceedings of SantaCrypt 2009, ISBN 978-80-904257-0-5, pp. 41-51, pdf.

Section: Block cipher DN, hash function HDN, a Concept of Hash Functions SNMAC (homepage):

·          Vlastimil Klima: Special block cipher family DN and new generation SNMAC-type hash function family HDN, IACR ePrint archive Report 2007/050 , February, 2007

·          Vlastimil Klima: About a new generation of block ciphers and hash functions - DN and HDN, SPI 2007, Security and Protection of Information, May 2 – 4, 2007, Brno, Czech Republic, www.unob.cz/spi, paper.pdf, presentation.pdf

·          Vlastimil Klima: New generation of hash functions SNMAC, SantaCrypt 2006, Prague, Hotel Olympik, December, 7. – 8., 2006, presentation.ppt (in Czech), paper.pdf (in Czech)

·          Vlastimil Klima: A New Concept of Hash Functions SNMAC Using a Special Block Cipher and NMAC/HMAC Constructions, IACR ePrint archive Report 2006/376 , October, 2006

Section: MD5 collisions and Tunneling - the fastest method and program in the world (homepage):

·          Vlastimil Klima: Tunnels in Hash Functions: MD5 Collisions Within a Minute, IACR ePrint archive Report 2006/105 , 18 March, 2006, source code

·          Vlastimil Klima: Finding MD5 Collisions on a Notebook PC Using Multi-message Modifications, March 31, 2005, IACR ePrint archive, Report 2005/102, 3rd Int. Conference Security and Protection of Information 2005, Brno, Czech Republic, May 3 - 5, 2005, presentation.ppt

·          Vlastimil Klima: Finding MD5 Collisions – a Toy For a Notebook, 5th March, 2005, IACR ePrint archive, Report 2005/075

Section: Breaking SSL/TLS (homepage):

·          Vlastimil Klima, Ondrej Pokorny, Tomas Rosa: Attacking RSA-based Sessions in SSL/TLS, presented at CHES 2003, pp. 426 - 440, Springer-Verlag, 2003, Preliminary version: IACR ePrint archive Report 2003/052

Section: Breaking private PGP signature keys (homepage):

·          Vlastimil Klima, Tomas Rosa: Attack on Private Signature Keys of the OpenPGP format, PGP (TM) Programs and Other Applications Compatible with OpenPGP, IACR ePrint archive Report 2002/076, March 2001

Section: Side Channels:

·          Vlastimil Klima, Tomas Rosa: Side Channel Attacks - Highly Promising Directions in Modern Cryptanalysis, TATRACRYPT '03, The 3rd Central European Conference on Cryptology, June 26-28, 2003, Bratislava, Slovakia

·          Vlastimil Klima, Tomas Rosa: Side Channel Attacks on CBC Encrypted Messages in the PKCS#7 Format, NATO PfP/PWP - 2nd International Scientific Conference Security and Protection of Information, Brno, Czech Republic, 28. - 30.4.2003, IACR ePrint archive Report 2003/098

·          Vlastimil Klima, Tomas Rosa: Further Results and Considerations on Side Channel Attacks on RSA, CHES 2002 , pp. 245-260, Springer-Verlag, 2002, IACR ePrint archive Report 2002/071

·          Vlastimil Klima, Tomas Rosa: Strengthened Encryption in the CBC Mode, IACR ePrint archive Report 2002/061, May 2002

Section: Others:

·          Vlastimil Klima: Staying up-to-date with cryptology,Information Security Summit 2008, Martinický Palace, May 28 – 29, 2008, Prague, pdf

Professional History:

·          2009 Started private company KNZ, s.r.o. (KNZ, Ltd.)

·          2004 - 2009 Independent cryptologist & consultant

·          2004 - 2004 Cryptologist with Czech security company LEC

·          1997 - 2003 Cryptologist with Czech security company DECROS (later acquired by ICZ) and ICZ

·          1996 - 1997 Independent cryptologist, cryptologist with Czech security company AEC

·          1995 - 1996 Cryptologist with Czech security company DECROS (later acquired by ICZ)

·          1994 - 1995 Cryptologist with German security company Tele Security Timmann

·          1993 - 1994 Cryptologist with two Czech security companies

·          1991 - 1992 Chief of R&D group, the Federal Ministry of Defense,

·          1982 - 1991 Chief of R&D group, Czech National Security Authority.

Projects:

As a cryptologist I co-operated in these projects:

·          projects for the Czech National Security Authority, 2005, 2006, 2007, 2008, 2009, 2010

·          crypto and security consultant for banking system xBanka, securing GSM system, securing WAN of smart electrometers, 2008 – 2009

·          BMW, EDON-R, candidates for NIST SHA-3 competition, 2008 – 2009

·          gigabit encryption device, lottery RNG, mobile banking system, ticket system, 2007 – 2008

·          special block cipher family DN and hash function family HDN, 2007

·          securing GSM communication system, 2007

·          security of a biometric system, standards in cryptography, 2006

·          new generation of hash functions SNMAC, 2006

·          MD5 collisions - proposition of the quickest method (tunnels) of MD5 collision, 2006

·          MD5 collisions - disclosing the Wang’s method, proposals of multi-message modification methods, 2005

·          securing European train communication system, securing SMS in GSM; military type of projects, 2004

·          analysis of protocols and formats OpenPGP, RSA-OAEP, RSA-KEM, CBC, SSL/TLS, 2001 - 2003

·          projects for the Czech National Security Authority, for protection of classified information, 2001 - 2002

·          the first Czech Cryptographic Service Provider for MS WindowsNT (CSP-I MicroCzech), 2000, certified by the Czech National Security Authority to protect classified information

·          the first world system for on-the-fly file encryption for Windows95(../98/NT/2000), 1995-2000

·          the first Czech elliptic-curve public-key encryption system (Ellipt), 1996

·          family of proprietary commercial encryption algorithms (WinCros), 1995

·          authentication and encryption device for the X.25 network, 1994

·          the first Czech encryption chip (SIC 5000), 1993

·          various SW encryption programmes, 1993

·          classified R&D, 1982 - 1992

Last update:

January 6th, 2010