Secure Flash-Memory Card Reader with Host-Encrypted Data on a Flash-Controller-Mastered Bus Parallel to a Local CPU Bus Carrying Encrypted Hashed Password and User ID

A secure flash-card reader reads a user ID from a secure card and finds a matching entry with a hashed password in a user table on the reader. An encrypted key is received from a secure host that hashes and encrypts a password the user types into the host and the user's ID. A card decryption en...

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Bibliographic Details
Main Authors SHEN MING-SHIANG, LEE CHARLES C, YU I-KANG, LEE EDWARD W
Format Patent
LanguageEnglish
Published 23.08.2007
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A secure flash-card reader reads a user ID from a secure card and finds a matching entry with a hashed password in a user table on the reader. An encrypted key is received from a secure host that hashes and encrypts a password the user types into the host and the user's ID. A card decryption engine uses a random number to decrypt the encrypted key and recover the hashed password and user ID from the secure host, which is compared by a comparator to the hashed password and user ID from the user table. A mismatch causes an access controller to block access to encrypted data on the secure card. Flash data is transferred over a flash-serial buffer bus between flash-card controllers and a RAM buffer. An encryption engine on the flash-serial buffer bus encrypts and decrypts data and connects to a serial engine to the host.
Bibliography:Application Number: US20070623863