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• Encrypt/decrypt a file even with two different passwords

  Hello world:
  
  I am quite new to Java and cryptography in general and have a theoretical question. The following scenario is possible and how it would be:
  Two users with two passwords (say a regular user and a superuser) encrypt, decrypt, read and write to the same file. Secret key for encryption and decryption must be based on their passwords (generated from their passwords), and not not stored anywhere on the system.
  
  I've been racking me my brains, but can't think of a way. Am I missing an obvious solution?
  
  Can it be done?
  
  Thank you
  Michael

  I don't think that you can avoid having more than a hash of password stored on the system. Using a combination of my approach and Jeff I can implement this as long as you leave a password protected key store must be stored on each system. Key store a given user would contain its RSA private key and the public key associated with certificate RSA for the admin user (thought the admin user's public key could be stored in the program since it does not have to be kept secret). The admin user key store will contain only its RSA private and public keys.

  Suppose that the data file must be create a nonadministrator user standard. The code performs the following actions-

  (1) to generate a key random symmetric algorithm. Tell a 128-bit AES key.
  (2) write a condensed version of the present in the output file.
  (3) he wrote the random key encrypted with her public key to the file.
  (4) he wrote his public key (or certificate) in the file.
  (5) that he wrote the random key that is encrypted with the public key of user admin to the file.
  (6) he encrypts data using keys written random the result in the file.

  This user can then update the file of

  (1) read the file the fingerprint of the random key.
  (2) reading of the random key encrypted with her public key.
  (3) decrypt this random key encrypted using its key private, extracted from its keystore.
  (4) check the fingerprint of this key to make sure it has the correct random key.
  (5) jump his certificate and random key encrypted with the public key for the admin user.
  (5) related to the decryption of data using the random key.
  (6) update of the data.
  (7) re - encrypt file, as described in the first part with a random key.

  The admin user can

  (1) read in the footprint of the random key file.
  (2) skip the random key that is encrypted with the public key of the user.
  (3) reading of the public key of the user of the file (for later use, if the file needs to be updated).
  (4) read the random key encrypted with the public key of the admin.
  (5) to decrypt the key random using the private key of the admin, obtained from its key store.
  (6) verify the fingerprint of the random key to ensure that it is correct.
  (7) to decrypt the data.

  The administrator can modify the data since it can re - encrypt data in a similar way to the way it was created in the first place.

• HP M9S72EA: PCI ENCRYPTION / DECRYPTION CONTROLLER

  Hello

  I need PCI of encryption / DECRYPTION CONTROLLER driver and controller PCI communications driver

  ID devices

  PCI\VEN_8086 & DEV_2298 & SUBSYS_80C5103C & REV_21
  PCI\VEN_8086 & DEV_2298 & SUBSYS_80C5103C
  PCI\VEN_8086 & DEV_2298 & CC_108000
  PCI\VEN_8086 & DEV_2298 & CC_1080

  My laptop is HP M9S72EA.  OS is Windows 7 64 bit.

  Thank you for your help.

  Hello:

  You need these drivers for devices...

  E/D PCI controller:

  This package provides the driver Intel Trusted execution engine Interface (CITY) for the laptop models running a supported operating system. The Interface of the Intel Trusted execution engine allows the Secure Boot and provides services required for the security features of platform such as Intel Platform Trust Technology (Intel PPT).

  FTP://ftp.HP.com/pub/SoftPaq/sp71001-71500/sp71264.exe

  Simple controller PCI of Comms:

  This package provides the driver Intel Management Engine Interface (MEI) for the notebook models and operating systems. The Intel Management Engine Interface allows communication between the host operating system and the Intel Management Engine firmware.

  FTP://ftp.HP.com/pub/SoftPaq/sp71001-71500/sp71258.exe

• HP Notebook 13 Stream c020na: controller for encryption/decryption PCI driver

  Hello

  My computer is down to a problem with the encryption/decryption PCI driver controller.

  Someone know where I can find the driver to download?

  Thank you

  L

  Hello:

  I think that this driver will install all of these devices...

  This package contains the driver which allows Intel platform dynamic and thermal firmware setting. Intel platform dynamic and thermal environment information system temperature and power use for the thermal protection of the system to work properly. This package is provided for the laptop models running a supported operating system.

  File name: sp69113.exe

• HP Pavilion 11 x 360: pilot missing PCI encryption/decryption controller

  Hello

  In my Manager under the other devices, it shows the encryption/decryption PCI controller missing the driver. I tried to find out using windows update and it cannot find a driver. Can you do me correcting t driver for this?

  Thank you

  Steve

  Hi, Steve:

  Download and install the driver Intel Trusted Execution support page for your laptop.

• HP pavilion p250ur: can not find the driver PCI encryption/decryption controller

  Hello! I can not find PCI encryption/decryption controller driver. Windows 8.1

  Hello:

  Give this one a try...

  http://h20566.www2.HP.com/hpsc/SWD/public/detail?sp4ts.Oid=5449369&swItemId=ob_128754_1&swEnvOid=4158

• Laptop HP 15-af008ax: could not find the drivers appropriate for ACPI\SMB0001\3 & 2411E6FE & 1 and PCI controller of encryption /Decryption

  After installing the drivers from the HP site I can not find drivers for ACPI\SMB0001\3 & 241E6FE & 1. Device Manager displays "UNKNOWN DEVICE" and said that no drivers were found for her. It is with th encryption /Decryption PCI controller.
  Please suggest me what to do. I'm confused ;-(

  Hello:

  You need this driver for the first...

  http://www.Synaptics.com/en/drivers.php

  To the PCI-E/D controller, you must manually install the driver as follows...

  Download and run this file.  Conclusion of any windows error.

  http://h20566.www2.HP.com/hpsc/SWD/public/detail?swItemId=vc_133833_1

  Go to Device Manager and click on the controller E/D PCI needing drivers.

  Click the driver tab.  Click on set to update driver.

  Select her browse my computer for driver software option and navigate to the folder of the driver that was created when you ran the file.

  This file will be located in C:\SWSetup\sp66974.

  Make sure that the include subfolders is selected and the driver should install.

  Then restart.

• HP 15-126ds: controller of encryption/decryption PCI for HP 15-126ds laptop

  Had to reinstall Windows 7 on this laptop. Was able to find all the devices with the exception of 2 drivers.

  PCI encryption/decryption controller

  and

  Unknown device

  In the properties on the Details tab, the value of hardware ID is ACPI\MSFT0101

  Help is appreciated!

  You are the very welcome.

  Yes, you are right, in which the TPM module has no value unless you use the Ultimate or Enterprise Version of W7.

  I'm surprised that the fix worked well.

  Long before MS released the hotfix, I found this basic driver I zipped to the top and attached it below.

  You can see if it works... instead of install, download and unzip the file in its folder.

  Don't do anything with the files in the folder.

  Go to Device Manager and click on the unknown device needing driver.

  Click the driver tab.  Click on set to update driver.  Select her browse my computer for driver software option and navigate to the driver folder, that you unzipped.

  Make sure that the include subfolders is selected and see if the pilot goes like this.

• 14 - ac136tu: PCI encryption/decryption controller

  I have a new laptop purchase. I install win 7 32 bit and also the drivers but still missing here. the encryption/decryption PCI controller... pls help me to solve this problem...

  Hello:

  See if this driver works...

  This package provides the driver Intel Trusted execution engine Interface (CITY) for the laptop models running a supported operating system. The Interface of the Intel Trusted execution engine allows the Secure Boot and provides services required for the security features of platform such as Intel Platform Trust Technology (Intel PPT).

  File name: sp71264.exe

• Laptop HP G2 355: help! Need controller driver for encryption/decryption PCI for new HP 355 G2 (AMD) w/Win 7 Pro 64-bit

  Just rebuilt new HP 355 G2 for Win 7 64 bit.  The ONLY driver I can't locate or get to work is the encryption/decryption of PCI controller. I have installed all the latest drivers for this model/OS of both HP and AMD sites is still no luck. Utility of automatic detection of AMD and Catalyst installed software all other drivers except this one successfully and when ends says that all drivers, including the chipset are installed successfully and current.

  I am at a total loss where to find this driver from a site of OEM, can you help me?

  Device ID:

  PCI\VEN_1022 & DEV_1537 & SUBSYS_15371022 & REV_00
  PCI\VEN_1022 & DEV_1537 & SUBSYS_15371022
  PCI\VEN_1022 & DEV_1537 & CC_108000
  PCI\VEN_1022 & DEV_1537 & CC_1080

  Thank you!!!

  Hello:

  You must run this driver and then install it manually.

  http://h20565.www2.HP.com/hpsc/SWD/public/detail?swItemId=vc_133833_1

  To manually install the driver in Device Manager and click on the controller of encryption/decryption IBOS who need the pilot.

  Click the driver tab.  Click on set to update driver.

  Select her browse my computer for driver software option and navigate to the folder of the driver that was created when you ran the file.

  This file will be located in C:\SWSetup\sp66974.

  Make sure that the include subfolders is selected, and the driver should install.

  Then restart.

• HP 240 G4: driver needed for encrypt/decrypt PCI controller

  Hello, I want to install drivers for the products HP 240 G4 (M8X89LT) and I can't find the driver for encrypt/decrypt PCI controller, I use windows 7 64 bit and looking for help here on the Board. Thanks in advance.

  You are the very welcome.

  Try the driver directly from Intel.  Accept the agreement, download, unzip and run the setup.exe file or use browse it to the method of file unzipped driver to install the driver.

  https://Downloadcenter.Intel.com/download/24892/Intel-TXE-Intel-trusted-execution-engine-driver-for-NUC5PGY-NUC5-x-py

• HP 15: PCI control of encryption/decryption

  my bluetooth does not work for HP15, also the encryption/decryption PCI controller shows a warning sign, thank you for giving me a solution. Unknown devices are also with warning signs, please give me a solution. WIFI does not work too.

  You are the very welcome.

  The only suggestion I can offer would be to try a different revision of the realtek bluetooth driver...

  This package contains the installation package driver for Realtek bluetooth in the laptop models running a supported operating system.

  File name: sp69555.exe

• HP 11-d011wm: pci encryption/decryption hp 11-d011wm controller

  I have a driver I can't find for encryption/decryption of pci controller. Ive tried all the drivers on the download page, nothing helps. Help, please!

  Hello:

  You need this driver...

  FTP://ftp.HP.com/pub/SoftPaq/sp64001-64500/sp64349.exe

• downgrade from windows 8 for windows 7 HP 15-g013dx PCI encryption/decryption controller

  Hello;

  I try on my 15-g013dx HP solve PCI encryption/decryption Controller for Windows 7 Home Premium 64-bit

  I have download AMD-Catalyst-14-9-win7-win8.1-64Bit-raid-sb and continue problem

  I download driver Intel engine of reliable performance and problem continue

  I download a lot of SP # for SM BUS Controller, AMD driver AMD USB 3.0 host controller driver filter USB and nothing works

  Thanks for any help with this problem of HP Support Experts.

  Hello:

  You need the driver for this device...

  http://h20565.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/swdDetails/?spf_p.tpst=swdMain&spf_p.prp_swdMain=wsrp-navigationalState%3DswItem%253Dvc_133833_1&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken

  You may need to install manually if auto installation does not work.

  To manually install the driver in Device Manager, click the controller E/D PCI needing drivers.

  Click the driver tab.  Click on set to update driver.  Select her browse my computer for driver software method and find the folder of the driver that was created when you ran the file.

  This file will be located in C:\SWSetup\sp66974.

  Make sure that the include Subolders and install the driver.  Then restart.

• PCI encryption/decryption controller

  Hi, need help. Just bought HP 250 G2 (works on Windows 7) and can't find the right driver for PCI control of encryption/decryption.

  Device ID:

  PCI\VEN_8086 & DEV_0F18 & SUBSYS_2190103C & REV_0C

  PCI\VEN_8086 & DEV_0F18 & SUBSYS_2190103C

  PCI\VEN_8086 & DEV_0F18 & CC_108000

  PCI\VEN_8086 & DEV_0F18 & CC_1080

  Thank you in advance,

  Miloš

  Hello:

  You need the driver for this device:

  http://h20565.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/swdDetails/?sp4ts.oid=6431933&spf_p.tpst=swdMain&spf_p.prp_swdMain=wsrp-navigationalState%3Didx%253D%257CswItem%253Dob_132245_1%257CswEnvOID%253D4059%257CitemLocale%253D%257CswLang%253D%257Cmode%253D%257Caction%253DdriverDocument&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken