PROTECTION D'UNE QUANTITE NUMERIQUE CONTENUE DANS UN CIRCUIT INTEGRE COMPORTANT UNE INTERFACE JTAG
L'invention concerne un procédé et un circuit de protection d'une quantité numérique stockée dans un microcontrôleur (1) comportant une interface JTAG (17'), consistant à rendre ladite quantité numérique dépendante d'une valeur (HID-VAL) stockée de façon non volatile dans le micr...
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| creator | SOZZANI FABIO |
| description | L'invention concerne un procédé et un circuit de protection d'une quantité numérique stockée dans un microcontrôleur (1) comportant une interface JTAG (17'), consistant à rendre ladite quantité numérique dépendante d'une valeur (HID-VAL) stockée de façon non volatile dans le microcontrôleur et rendue inaccessible si des signaux sont présents en entrée de l'interface JTAG.
The method involves making a digital quantity dependent on a stored value (HID-VAL) in a microcontroller in a non volatile manner, where the quantity is made inaccessible if signals are present in input of joint test action group (JTAG) interface (17`). The value is constituted of a parameter for generating a key used by a cryptographic function of the microcontroller. Another value (DEB VAL) is used to generate the key of the cryptographic function when the signals are present in the input of the interface. An independent claim is also included for a microcontroller comprising central processing unit, non volatile storage element and JTAG interface. |
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The method involves making a digital quantity dependent on a stored value (HID-VAL) in a microcontroller in a non volatile manner, where the quantity is made inaccessible if signals are present in input of joint test action group (JTAG) interface (17`). The value is constituted of a parameter for generating a key used by a cryptographic function of the microcontroller. Another value (DEB VAL) is used to generate the key of the cryptographic function when the signals are present in the input of the interface. An independent claim is also included for a microcontroller comprising central processing unit, non volatile storage element and JTAG interface.</description><language>fre</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><creationdate>2007</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20070112&DB=EPODOC&CC=FR&NR=2888433A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76418</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20070112&DB=EPODOC&CC=FR&NR=2888433A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SOZZANI FABIO</creatorcontrib><title>PROTECTION D'UNE QUANTITE NUMERIQUE CONTENUE DANS UN CIRCUIT INTEGRE COMPORTANT UNE INTERFACE JTAG</title><description>L'invention concerne un procédé et un circuit de protection d'une quantité numérique stockée dans un microcontrôleur (1) comportant une interface JTAG (17'), consistant à rendre ladite quantité numérique dépendante d'une valeur (HID-VAL) stockée de façon non volatile dans le microcontrôleur et rendue inaccessible si des signaux sont présents en entrée de l'interface JTAG.
The method involves making a digital quantity dependent on a stored value (HID-VAL) in a microcontroller in a non volatile manner, where the quantity is made inaccessible if signals are present in input of joint test action group (JTAG) interface (17`). The value is constituted of a parameter for generating a key used by a cryptographic function of the microcontroller. Another value (DEB VAL) is used to generate the key of the cryptographic function when the signals are present in the input of the interface. An independent claim is also included for a microcontroller comprising central processing unit, non volatile storage element and JTAG interface.</description><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2007</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNjDEOwjAQBN1QIOAP11FRgCncWs45GCnn5DjXUYJMhSBS-L9wJB5AtavR7K7V2HIUdBIiQbVPhNAlSxIEgVKDHLqE4CIJUimVpRskAhfYpSAQCq95EZo2spQhLBcLZm8dwlVsvVWrx_Cc8-6XGwUexV0OeXr3eZ6Ge37lT-_5ZIw5a22P-g_lC7KUM_A</recordid><startdate>20070112</startdate><enddate>20070112</enddate><creator>SOZZANI FABIO</creator><scope>EVB</scope></search><sort><creationdate>20070112</creationdate><title>PROTECTION D'UNE QUANTITE NUMERIQUE CONTENUE DANS UN CIRCUIT INTEGRE COMPORTANT UNE INTERFACE JTAG</title><author>SOZZANI FABIO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_FR2888433A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>fre</language><creationdate>2007</creationdate><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</topic><toplevel>online_resources</toplevel><creatorcontrib>SOZZANI FABIO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SOZZANI FABIO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROTECTION D'UNE QUANTITE NUMERIQUE CONTENUE DANS UN CIRCUIT INTEGRE COMPORTANT UNE INTERFACE JTAG</title><date>2007-01-12</date><risdate>2007</risdate><abstract>L'invention concerne un procédé et un circuit de protection d'une quantité numérique stockée dans un microcontrôleur (1) comportant une interface JTAG (17'), consistant à rendre ladite quantité numérique dépendante d'une valeur (HID-VAL) stockée de façon non volatile dans le microcontrôleur et rendue inaccessible si des signaux sont présents en entrée de l'interface JTAG.
The method involves making a digital quantity dependent on a stored value (HID-VAL) in a microcontroller in a non volatile manner, where the quantity is made inaccessible if signals are present in input of joint test action group (JTAG) interface (17`). The value is constituted of a parameter for generating a key used by a cryptographic function of the microcontroller. Another value (DEB VAL) is used to generate the key of the cryptographic function when the signals are present in the input of the interface. An independent claim is also included for a microcontroller comprising central processing unit, non volatile storage element and JTAG interface.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION |
| title | PROTECTION D'UNE QUANTITE NUMERIQUE CONTENUE DANS UN CIRCUIT INTEGRE COMPORTANT UNE INTERFACE JTAG |
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