Inventor
COPPERSMITH DON
US22 patents
Patents
22 patentsUS6996543B1Feb 7, 2006
System for protection of goods against counterfeiting
IBM150 citations99
US6069955AMay 30, 2000
System for protection of goods against counterfeiting
IBM234 citations99
US5796827AAug 18, 1998
System and method for near-field human-body coupling for encrypted communication with identification cards
IBM711 citations99
US6243470B1Jun 5, 2001
Method and apparatus for advanced symmetric key block cipher with variable length key and block
IBM83 citations97
US5592553AJan 7, 1997
Authentication system using one-time passwords
IBM565 citations97
US5454039ASep 26, 1995
Software-efficient pseudorandom function and the use thereof for encryption
IBM97 citations97
US6256736B1Jul 3, 2001
Secured signal modification and verification with privacy control
IBM53 citations96
US6192129B1Feb 20, 2001
Method and apparatus for advanced byte-oriented symmetric key block cipher with variable length key and block
IBM67 citations96
US6185679B1Feb 6, 2001
Method and apparatus for a symmetric block cipher using multiple stages with type-1 and type-3 feistel networks
IBM66 citations96
US6185304B1Feb 6, 2001
Method and apparatus for a symmetric block cipher using multiple stages
IBM59 citations96
US5835597ANov 10, 1998
Software-efficient pseudorandom function and the use thereof for decryption
IBM44 citations96
US5768390AJun 16, 1998
Cryptographic system with masking
IBM60 citations96
US5661807AAug 26, 1997
Authentication system using one-time passwords
IBM223 citations96
US4908861AMar 13, 1990
Data authentication using modification detection codes based on a public one way encryption function
IBM148 citations94
US7100050B1Aug 29, 2006
Secured signal modification and verification with privacy control
IBM22 citations92
US6301362B1Oct 9, 2001
Method and apparatus for cryptographically transforming an input block into an output block
IBM45 citations92
US6189095B1Feb 13, 2001
Symmetric block cipher using multiple stages with modified type-1 and type-3 feistel networks
IBM52 citations92
US5675652AOct 7, 1997
Computer readable device implementing a software-efficient pseudorandom function encryption
IBM23 citations92
US6101275AAug 8, 2000
Method for finding a best test for a nominal attribute for generating a binary decision tree
IBM30 citations91
US4675650AJun 23, 1987
Run-length limited code without DC level
IBM36 citations91
US4564944AJan 14, 1986
Error correcting scheme
IBM32 citations90
US7236592B2Jun 26, 2007
Efficient stream cipher system and method
IBM18 citations83