The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 2011
Filed:
Mar. 12, 2007
Charles C. Lee, Cupertino, CA (US);
I-kang Yu, Palo Alto, CA (US);
Edward W. Lee, Mountain View, CA (US);
Abraham C. MA, Fremont, CA (US);
Ming-shiang Shen, Taipei Hsien, TW;
Charles C. Lee, Cupertino, CA (US);
I-Kang Yu, Palo Alto, CA (US);
Edward W. Lee, Mountain View, CA (US);
Abraham C. Ma, Fremont, CA (US);
Ming-Shiang Shen, Taipei Hsien, TW;
Super Talent Electronics, Inc., San Jose, CA (US);
Abstract
An electronic data flash card includes a random number generator that generates a random number stored in the card and a host system each time the card is accessed by the host system. The random number is used by the host system to encrypt a logical branch address, a user password, and user data that is written to and stored in a secure area of the card. The random number is encrypted using a key associated with the card, and the encrypted random number is stored by the card with the associated encrypted data. The random number is not stored in the host system. A new random number is generated each time the card is queried. In a read process the host system decrypts the encrypted random number using the key, then uses the random number to decrypt the associated encrypted data. Access to read/write processes are password protected.