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Cryptografie

Cryptografie. Door Prof.dr.Frits Beukers. Ouderdag A-Eskwadraat , 10 februari 2007. Het Caesar cryptosysteem. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z D E F G H I J K L M N O P Q R S T U V W X Y Z A B C. YXJO LEEBWKX LVOOP LOGOBOX NKD RI WKDROWKDSMS XKNOB UYX MVKCCSPSMOBOX

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Cryptografie

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  1. Cryptografie Door Prof.dr.Frits Beukers Ouderdag A-Eskwadraat, 10 februari 2007

  2. Het Caesar cryptosysteem A B C D E F G H I J K L M N O P Q R S T U V W X Y Z DE F G H I J K L M N O P Q R S T U V W X Y Z A B C

  3. YXJO LEEBWKX LVOOP LOGOBOX NKD RI WKDROWKDSMS XKNOB UYX MVKCCSPSMOBOX SX NSFSCSOC OX GOV NBSO GOVUO NBSO - UKX WOX XE GOV CDOVVOX - YXNOBCMROSNNO NOJO WKX? 1. NO QBYOZ NSO QYON UKX DOVVOX 2. NO QBYOZ NSO NKD XSOD UKX A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  4. YXJO LEEBWKX LVOOP LOGOBOX NKD RI WKDROWKDSMS XKNOB UYX MVKCCSPSMOBOX SX NSFSCSOC OX GOV NBSO GOVUO NBSO - UKX WOX XE GOV CDOVVOX - YXNOBCMROSNNO NOJO WKX? 1. NO QBYOZ NSO QYON UKX DOVVOX 2. NO QBYOZ NSO NKD XSOD UKX A B C D E F G H I J K L M N O P Q R S T U V W X Y Z O

  5. YXJO LEEBWKX LVOOP LOGOBOX NKD RI WKDROWKDSMS XKNOB UYX MVKCCSPSMOBOX SX NSFSCSOC OX GOV NBSO GOVUO NBSO - UKX WOX XE GOV CDOVVOX - YXNOBCMROSNNO NOJO WKX? 1. NO QBYOZ NSO QYON UKX DOVVOX 2. NO QBYOZ NSO NKD XSOD UKX A B C D E F G H I J K L M N O P Q R S T U V W X Y Z K L M N O P Q R S T U V W X Y Z A B C D E F G H I J

  6. ONZE BUURMAN BLEEF BEWEREN DAT HY MATHEMATICI NADER KON CLASSIFICEREN IN DIVISIES EN WEL DRIE WELKE DRIE - KAN MEN NU WEL STELLEN - ONDERSCHEIDDE DEZE MAN? 1. DE GROEP DIE GOED KAN TELLEN 2. DE GROEP DIE DAT NIET KAN

  7. Substitutiecodes met sleutel Sleutel: Willem de Zwijger A B C D E F G H I J K L M N O P Q R S T U V W X Y Z W I L E M D Z J G R A B C F H K N O P Q S T U V X Y

  8. Code van Vigenère Sleutel: Loper A B C D E F G H I J K L M N O P Q R S T U V W X Y Z L M N O P Q R S T U V W X Y Z A B C D E F G H I J K O P Q R S T U V W X Y Z A B C D E F G H I J K L M N P Q R S T U V W X Y Z A B C D E F G H I J K L M N O E F G H I J K L M N O P Q R S T U V W X Y Z A B C D RS T U V W X Y Z A B C D E F G H I J K L M N O P Q

  9. Enigma

  10. Enigma

  11. Public key cryptografie Publieke sleutel:: Geheime sleutel:: ? ?

  12. Toepassing: SSL = Secure Socket Layer bij Beveiligde internetpagina’s ontwikkeld door Netscape

  13. Bekendste public key systeem: RSA naar Rivest Shamir Adleman

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