Unlock instant, AI-driven research and patent intelligence for your innovation.

Secure writing of data

A data processor and file technology, which is applied in the direction of data error detection and response error generation, to achieve the effect of ensuring integrity

Inactive Publication Date: 2003-09-17
GEMPLU
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally require several memory write operations, which increases the write time by a factor of two or three, with a corresponding increase in the risk of memory corruption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Secure writing of data
  • Secure writing of data
  • Secure writing of data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] see figure 1 , shows an EEPROM or Flash EPROM electronically erasable non-volatile memory M, which is controlled by a controller (not shown), which may be a programmed microprocessor.

[0015] In practice, the memory M and the microprocessor forming the memory controller are realized on the same electronic component, which is also called a semiconductor chip.

[0016] Typically, the memory M is used to store information structured as a logical entity controlled by said memory controller. In practice, the memory M is divided into, for example, one byte elements for reading information, and into pages for deleting said information, wherein said write operations can also be performed on a page-by-page basis .

[0017] By suitable programming, the memory controller is adapted to organize, ie synchronize, said logical entities of one or more data types into pages. Such synchronization is described, for example, in application EP 0 767 742 .

[0018] By way of example, a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A data processor, such as, for example, a smart card, comprises a controller for managing a file wherein a plurality of records can be stored in a sequential fashion. The controller checks whether a record has correctly been written into the file. The controller prevents user-related software from reading the record that is subsequent to the last record that has correctly been written.

Description

technical field [0001] The present invention relates to secure writing of data in writable memory. [0002] It can be used in microelectronics in general and in the field of electronic memory cards in particular, especially contact and / or contactless cards and wired logic cards and / or microprocessor cards. Background technique [0003] In practice, the electronic memory used in the card is EPROM flash memory or EEPROM memory ("Electrically Erasable Programmable Read-Only Memory"), which is non-volatile and electronically erasable and therefore writable into the memory. [0004] In general, establishing a transaction with a memory card, especially a contactless card, needs to be very fast. Moreover, such transactions must be protected against possible data loss, also known as data corruption, which is prone to accidental power loss eg when a write operation is performed. [0005] Known methods for writing data in rewritable memory provide a certain degree of security in ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F12/16G06F11/14G06K19/073G11C16/10G11C16/22
CPCG06F11/1435G11C16/102G11C16/22
Inventor 乔斯·门尼卡特埃里克·德劳内伊
Owner GEMPLU