参数资料
型号: FTDI USB-KEY
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 5/10页
文件大小: 0K
描述: MOD USB SECURITY KEY DEVICE
产品目录绘图: FTDI USB-KEY
标准包装: 10
系列: USBmadeEZ-UART
附件类型: USB 安全密匙
技术规格: USB 不对称公用密钥加密安全密码锁
适用于相关产品: PC,带 USB 接口
其它名称: 768-1075
USB-KEY
Document Reference No.: FT_000062
USB-Key Datasheet Version 1.00
Clearance No.: FTDI# 41
2.4 Using the EEPROM Writeable Area of the FTDI USB Key.
To further improve security, the unique FTDIChip-ID? number read from the FTDI USB Key
can be read, further encrypted and written back to a EEPROM user accessible area within the
FTDI USB Key. This further security could make use of industry standard encryption methods
(DES, 3DES, AES, Blowfish for example) plus make use of a timestamp for registration
purposes. To access this user area it is necessary to use the FT_EE_UASize, FT_EE_UAWrite
and the FT_EE_UARead function calls available in the D2XX.dll. This DLL is available from the
FTDI driver download area at D2XX Direct Drivers. The D2XX programmers guide is also
available from D2XXPG34.pdf.
The amount of EEPROM user available space available varies depending on what data has
already been written to the EEPROM. Generally, the longer the strings written to the EEPROM,
the less free space available. Users should check that sufficient space is available to write back
any further encrypted data.
2.5 Viewing Contents of FTDI USB Key
The FTDI USB Key Device Descriptors and Configuration Descriptors can be read using the
USBView software utility.
USBView can be downloaded free from the FTDI website at
http://www.ftdichip.com/Resources/Utilities.htm
Copyright ? Future Technology Devices International Limited
4
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