Consultancy
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Tulip, Data Encryption
Unit, 's-Hertogenbosch, 1989.
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Intercai, Automatic Passage Charging
System, Utrecht, 1990.
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Pneutec, Coding for the positioning of a shaft, Hoofddorp, 1993.
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Philips Consumer Electronics, Cryptoworks, Eindhoven, 1994.
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Dutch Association of Banks, A study of IDEA, Amsterdam, 1999.
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Dutch Association of Banks, A study of elliptic curve cryptosystems,
Amsterdam, 1999.
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National Library of the
Netherlands, Document Integrity, 's-Gravenhage, 1999.
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Ministry of Defense, Evaluation of the cryptographic aspects of a Virtual
Private Network, the Hague, 2000.
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ABN-AMRO, Security evaluation of the Gordian algorithm, Amsterdam,
2000.
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ING, General consultancy, from 2000.
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Twijnstra, Workshop contribution, 2000.
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Beyond If, Evaluation of a cryptographic algorithm, Wheaton, Ill., 2002.
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Trustalert, RAUS evaluation, Apeldoorn, 2003.
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Tailor Made Products, Cryptanalysis of a stream cipher, 2004.
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Hoffmann, An encryption method, 2005.
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Waterschapshuis, RIES¸ 2008.
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SDU, Electronisch paspoort, 2008.