Knowledge about PDF encryption, PDF password security and PDF password recovery.

Shenzhen, Guangdong -- (SBWIRE) -- 05/09/2010 -- Generally, PDF files are with a password called User Password, which is used to open the file and view the document. To encrypt a PDF password does not simply mean you can't open and view the document, but PDF files have five to seven encryption ways to protect the file for office needs. Owner password, the other password of PDF files, is another crucial PDF password, which is to protect the file from maybe being copied (to Clipboard), printed, or modified, etc. So, in speaking of PDF password, it doesn't necessary mean the one which you use to open the file.

PDF encryption largely relies on the sophisticated algorithm that hardly to be reversed. For example, you are easy to calculate that 1000 plus 1 is 1001, however, the reverse is seemed impossible, for 1001 can be an answer of countless calculations. PDF encryption works in the similar way. In this sense, given a password, it's easy to deduce and decipher some data; however, the reverse PDF password recovery seems impossible.

Generally speaking PDF encryption with 128 bits key value is much more secure than that of 32 bits. PDF encryption is accomplished by a key value, either 128 or 32 bits in size. When using the key, all the bytes are changed (unless they are decoded back with the same key) into meaningless codes, and the file is impossible to be opened. Only the meaningless codes are calculated back using the correct value is it possible to get the correct password and open the file. 128 bits has a lot more possible values than the one with 32 bits, so it is much more secure. If your password is forgotten and intend to recover PDF password, PDF Password Unlocker software could be faster, for it supports 128 bits encryption, either 128 bits RC4 or 128 bits AES encryption.

PDF files are composed with objects, like image Objects, graphic Objects, and text Objects, etc. The key is calculated for each PDF Object in the PDF file using local data, which is much hard to crack, as the key keeps changing.

Set and remove PDF passwords

Add a PDF Password
1. Click the Secure button in the Tasks toolbar, and choose Password Encrypt.
2. Click "Yes" to the prompt about changing the security, and if necessary, type the Permissions password that lets you change security settings. If you don't know the password, contact the author of the PDF.
3. In the Password Security - Settings dialog box, set the security options as desired, confirm the password, click OK, and then click OK again.
4. Save the document to apply the security settings.

Note: You can also restrict editing capabilities when you certify a document, or when you apply a policy to a PDF.

Remove PDF passwords and security settings
You can remove PDF passwords and security policies from an open PDF if you have the permissions to do so. If the PDF is secured with a security policy that resides on a server, the changes can be made only by the author of the policy or by a server administrator.

1. Do one of the following: Click the Secure button in the Tasks toolbar, and choose Remove Security.
Type your password, and click Yes to the prompt about removing the security.
In the Security tab of the Document Properties dialog box, choose No Security from the Security Method menu.
2. When prompted, specify the Permissions password, and then click OK.

Recover PDF password in case you forgot it.
Every coin has two sides. Even the PDF document is strongly encrypted with passwords, it is impossible to insure that it is secure. Once you forgot PDF password, the data in the encrypted PDF file are on the risk of unavailability. Unless fortunately the password knocks your memory again, you got the data lost or you have to give up the document eventually. With the ever-growing of strong encryption algorithms, decryption algorithms gradually come into existing, too. Though the cracking is far more difficulty than ever before, it is still of help to those expecting to recover PDF password and access the password protected PDF file. Take PDF Password Unlocker (http://www.passwordunlocker.com/products/ppu.html ), a popular PDF password recovery software, for example, it has adopted the advanced decryption algorithms to crack 40-bit RC4, 128-bit RC4, 128-bit AES, and 256-bit AES encrypted passwords with 3 attack methods, Dictionary attack, Brute-force attack, and Brute-force with Mask attack

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Shenzhen, Guangdong -- (SBWIRE) -- 01/20/2010 -- Excel Password Unlocker 4.0 is a professional Excel Password Recovery Tool for you to open and view the Excel workbooks and sheets. It not only recovers the "Password to Open" but helps to remove both the "Password to Open" and "Password to Modify" to make it possible for you to view and edit the workbooks and sheets. And now it can recover passwords for Microsoft Excel of all versions through 97 to 2007

The password recovery program focuses on recovering password. Enhanced with three attack modes, brute-force attack, brute-force with mask attack and dictionary attack.The most flexible in this program is it allows you to customize it with providing password features and creating a new dictionary for the program to base on. Well, if you remember part of the password, such as its length, any digits, any specific letters, any special symbols are in the passwords, you can offer all these to the program to ease its calculation work. For example, you remember your password is 4***@, then you just indicate the program that your password is 4 characters with the initial character is 4 and the last one is @, then the program will just seek for the three characters in the middle instead of the whole five characters, reducing almost half of the work! For the dictionary attack, you may directly create a text file listing the frequently used password characters and sets to let the program base on, which may reduce the time from one hour to one minute!

This Excel Password Recovery Software is super easy to use with user-friendly interfaces and clear instructions. Different from grand programs like Windows, Adobe Photoshop, Microsoft Office with multiple functions, this software is little in scale and easy to manipulate. Neither professional knowledge like that of Windows OS is required nor terminologies like those of Adobe Photoshop is containing are difficult to understand, this program is solely for password recovery with only several terms like attack, dictionary and mask, etc. which are so easy to grab if use it once. So, you may just feel free to try the software.

Company Site: http://www.passwordunlocker.com
Product Page: http://www.passwordunlocker.com/products/epu.html
Download Link: http://www.passwordunlocker.com/downloads/excel_password_unlocker_trial.exe

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm

Password Unlocker Bundle is a professinaol password recovery kit, which contains series of password recovery tools: Windows password recovery, PDF password recovery, MS documents password recovery, MS Excel password recovery, WinZIP/ZIP password recovery, WinRAR/RAR password recovery, MS SQL password recovery, Internet password recovery, Windows Live/MSN password recovery, MS Access password recovery, Outlook password recovery, and Outlook Express password recovery, etc., No matter you are at home or in office ,the bundle helps to reset the password we forgot or lost. Now it is only cost $34.94, but the potential value is up to $300!

Shenzhen, Guangdong -- (SBWIRE) -- 01/18/2010 -- Password Unlocker Bundle 5.5 is developed with a simple idea: Offer an easy and all-in-one lost password recovery solution to benefit every computer user around the world. It is built with featured functions to recover lost passwords for Office files, like Word, PowerPoint, Excel, Instant Messengers like MSN, GTalk, and AOL, Access, MS SQL databases, ZIP/WinZIP, RAR/WinRAR archives, Outlook Express, Outlook emails and PDF files. It also shows advantage in Windows password recovery to recover lost Windows administrator password or user passwords.

This password unlocker bundle integrated all the flagship products of Password Unlocker Corporation to make it simpler, easier and one-stop password recovery solution both at home and in office.

Three password recovery attack modes (brute-force attack, brute-force with mask attack, and dictionary attack) are applied for file and folder password recovery functions, like Word password recovery, Excel password recovery, PowerPoint password recovery, RAR password recovery, ZIP password recovery, and PDF password recovery. These attacks are the mostly used and the most effective password recovery method in password recovery industry.

The software kit can successfully and instantly recover lost passwords for Instant Messengers, Emails, and websites in Internet Explorer. Instant Messengers like MSN, GTalk, and AOL can be easily and instantly recovered in less than a second. For Outlook password recovery and Outlook Express password recovery, it can recover the Sever Address, Login, Password, and Server Type simultaneously. In recovering logins and passwords cashed in Internet Explorer, the tool can achieve the task in a snap. For recovering passwords for MSN, GTalk, and AOL, the engine displays Login, Password and the IM Type immediately.

Users don't have to install the application onto the server machine of the MS SQL when use it to recover SQL password either administrator password or other user passwords. If you've got the master.mdf file ready, you are easy to use it to recover the password on any computer and to reset the password to be blank.

The Password Unlocker Bundle performs excellent when referring to the Windows password recovery. It recovers not only Windows administrator password but user passwords with administrative privileges. The process is simple with burning the core Windows password recovery application ISO image file onto CD/DVD, use the CD/DVD to boot the locked computer, and proceeds to reset the password to be blank would be all at ease.

Home page: http://www.passwordunlocker.com
Product page: http://www.passwordunlocker.com/products/pub.html
How-to: http://www.passwordunlocker.com/products/how_to_use_pub.html

Email: info@passwordunlocker.com

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm

PDF Password Unlocker 4.0 is based on PDF Password Unlocker 3.0 yet enhanced in the attack force and computing speed

Shenzhen, Guangdong -- (SBWIRE) -- 11/04/2009 -- PDF Password Unlocker 4.0 is used to decrypt password-protected Adobe Acrobat PDF documents, including both the "password to open" and "password to modify" which protect the file from opening and modifying respectively. This program not only helps to detect the passwords, decrypts the file and opens the document, but allows you to remove the "password to open" to perform the operations that is restricted even when the document is decrypted, like copying text and graphics out of the documents, modifying the document, adding or modifying text notes, printing, etc. Decrypted file can be opened in any PDF viewer (e.g. Adobe Acrobat Reader) without any restrictions—i.e. with edit/copy/print functions enabled. All versions of Adobe Acrobat (including 9.x, which features 128-bit encryption) are supported.

PDF Password Unlocker 4.0 is based on PDF Password Unlocker 3.0 yet enhanced in the attack force and computing speed. This new version is highlighted in the powerful function to remove all restrictions placed on the Adobe Acrobat PDF documents, accelerated attack speed, and improvement in the UI design and instructions, which is more considerate and closer for both the new and veteran users.

Compare to the old versions, PDF Password Unlocker 4.0 has followings highlights:

Support Adobe PDF versions from 3.X to 9.X

Support PDF files created by other PDF applications

Support 40-bit RC4 encryption

Support 128-bit RC4 encryption

Support 128-bit AES encryption

Support 256-bit AES encryption

Instantly enable actions for copying, printing and others 4,000,000 passwords/s and 8,000,000 passwords/s for multiple-core computers .

Available in 3 attacks brute-force, brute-force with mask, dictionary .

Able to minimize the recovery time by customizing the password character set if any part of the password is known

Save the recovery process and resume if interrupted or terminated unintentionally

Support multiple processor, multiple core

A year's free upgrade and technical support

Three attacks make it faster in speed and more powerful than ever before. The three attacks, brute-force attack, brute-force with mask attack, and dictionary attack, are crucial to the attack speed. They are designed and targeted to be used for different password cases, ignoring how well the password is set. For example, you use the brute-force attack to find the password with no traces, i.e. you forget it all; you use the brute-force with mask attack to look for the password by offering hints, like any capitals, digits, pond key in the password, etc. Dictionary attack is far flexible and smarter for users. You specify a dictionary with creating a text file listing the possible password character sets for the program to base on, which may double or triple the attack speed in an incredible way.

Home page: http://www.passwordunlocker.com
Product page: http://www.passwordunlocker.com/products/ppu.html
Download page: http://www.passwordunlocker.com/downloads/pdf_password_unlocker_trial.exe Purchase page: https://www.regnow.com/softsell/nph-softsell.cgi?ss_short_order=true&items=19681-26&ss_cart_reset=true&quantity=
How-to: http://www.passwordunlocker.com/products/how_to_use_ppu.html

Email: info@passwordunlocker.com

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm

Shenzhen, Guangdong -- (SBWIRE) -- 09/02/2009 -- Excel Password Unlocker 3.0 is designed to recover passwords for Microsoft Excel of all versions from 97 to 2007. It recovers/removes "Password to Open" and "Password to Edit" to make the password-protected document viewable and editable for you!

This program is strong in functions! You can not only recover the "Password to Open" but to remove both the "Password to Open"and "Password to Edit". Moreover, it's able to recover long and sophisticated passwords that other programs may can't. The password recovery rate is high, arriving at 220,000 guesses per second. The program also allows setting the computer CPU priority to increase the performance, additionally, it can resume the cracking project for the last time if interrupted or stopped. With all these qualified functions, you are easy to get a program with smooth and fast performance.

It offers three password recovery modes, including brute-force attack, brute-force with mask attack and dictionary attack. While brute-force attack is powerful in cracking small and simple passwords, brute-force with mask attack and dictionary attack advantages in long and sophisticated passwords! For brute-force with mask attack, it is used if you still remember any attributes of your password, like the password length, any digits, special characters, capitals in the password and what are them. These information are crucial that may double, triple or even centuple the speed! For example, you remember the password is 6 characters long, with the middle characters are "A&", the last is "9", then your password is "**A&*9". In this case, the program can just crack the first two characters and the fifth character, instead of the whole password without any clue, like the password length, the characters in the password.

The program is easy to use with straightforward instructions and clear, user-friendly interfaces! There is no professional knowledge required and even a new user can fully manipulate the program in less than a minute.

Company Site: http://www.passwordunlocker.com
Product Page: http://www.passwordunlocker.com/products/epu.html
Screenshot: http://www.passwordunlocker.com/images/screenshots/excelpasswordbig.gif
Download Link: http://www.passwordunlocker.com/downloads/excel_password_unlocker_trial.exe
Buy Link: https://www.regnow.com/softsell/nph-softsell.cgi?ss_short_order=true&items=19681-35&ss_cart_reset=true&quantity=1
Email: office@passwordunlocker.com

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm

Password Unlocker Bundle 3.0 is Released to Easily and Quickly Recover Passwords for Windows, Office, PDF and RAR Documents

Shenzhen, Guangdong -- (SBWIRE) -- 09/01/2009 -- Password Unlocker Bundle coming with Windows Password Unlocker 4.0, Office Password Unlocker 3.0, and PDF Password Unlocker 3.0, is released to reward its customers with the best price!

Password Unlocker Bundle is a powerful password recovery software kit containing RAR Password Unlocker 3.0, ZIP Password Unlocker 3.0, Windows Password Unlocker 4.0, Word Password Unlocker 3.0, Excel Password Unlocker 3.0 and PDF Password Unlocker 3.0. This all-in-one solution to recover lost or forgotten passwords for WinRAR/RAR, WinZIP/ZIP archives, Windows OS, PDF documents, Word and Excel files is the ever easiest-to-use toolkit with the most wallet-friendly price!

Enhanced with the dynamic password recovery functions and the fast speed, RAR Password Unlocker 3.0 works amazingly for recovering the encrypted archives compiled with important files and folders. This password recovery tool is handy enough to manipulate. Enter the full path to the RAR archives, choose a recovery mode among the provided three strong password attack modes, initiate the recovering and display the recovered password --- all are as easy as a pie. If in any case, the password is lost or forgotten, instead of trapped in a panic you are totally at ease with it at hand. If the archive is with the extension as zip, then alternatively just use ZIP Password Unlocker 3.0 to resolve the problem.

Windows Password Unlocker 4.0 is a professional tool to remove Windows login password and let users access Windows easily in case the password is lost or forgotten. Different from most of the prevailing products in CLI (Command Line Interface) on the market, this program is a GUI (Graphic User Interface) program with mouse pointer and graphic interface to select options and menus instead of typing commands to perform specific tasks, which is much more used to common users. The whole process is as easy as a pie and time-saving with a matter of several seconds!

Office Password Unlocker 3.0 is a newly released version with huge improvement in functions and UI design as well. The program offers three different password attack types for different password cases, which is bound to strengthen the attack and increase the efficiency.

PDF Password Unlocker 3.0 with both the ability to remove "User Password" and "Owner Password" is to help you open and modify the document weather it is an e-text, e-book, or e-magazine, etc. This 3.0 version is a newly upgrade too on its polished UI and enhanced functions as well.

Word Password Unlocker 3.0, Excel Password Unlocker 3.0 are typically help to solve the problem to open or edit the encrypted Word, Excel documents when the passwords are for any reasons unavailable. They are little programs that really rock as well.

Product page: http://www.passwordunlocker.com/products/pub.html
Buy link: https://www.regnow.com/softsell/nph-softsell.cgi?ss_short_order=true&items=19681-29&ss_cart_reset=true&quantity=1
Email: info@passwordunlocker.com

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm

ZIP Password Unlocker 3.0 Is Released with Supporting All Versions of ZIP Versions!

Shenzhen, Guangdong -- (SBWIRE) -- 08/13/2009 -- ZIP Password Unlocker 3.0 is released to recover ZIP password for you to easily open and extract files from ZIP archive!

ZIP Password Unlocker 3.0 supports to recover ZIP password of all versions for you to open and extract files in the archive. ZIP archives are widely used to save disk space, as email attachments for faster sending, uploading and downloading, etc. The case is you forgot the password set by yourself! ZIP Password Unlocker 3.0 is just to meet this need for you to recover the password!

ZIP Password Unlocker 3.0 supports to recover long passwords! Empowered by the three attack modes brute-force attack, brute-force with mask attack and dictionary attack, this software is powerful enough to recover long and sophisticated passwords! And the speed is fast with more than 2200000 passwords per seconds!

Brute-force with mask attack is the highlight of the program! If you still remember part of the password or some features of the password, then you are lucky enough to use this mode to recover the password. You are allowed to provide any trace to the program to reduce its calculation load, for example, you remember your password is 6-character long, begins with A and ends with pond, then you can define the mask as "A****#", and you tell the program that there is digits in the program. Then the program starts to attack the password with the four characters in the middle instead of the whole six, and it will set to find one of the character as a digit, which reduces incredible quantity of working load, saving time!

ZIP Password Unlocker 3.0 supports transmission resuming at break-points. While the program is processing for the password, if the program is stopped accidently or intentionally, next time when you start the program, it will ask whether to continue with the last project or not. This avoids repeat processing if stopped! The program also allows setting the CPU priority for an accelerated performance when recovering long and sophisticated passwords.

In addition to the powerful functions, and simply for recovering ZIP password, this program is super easy to use, even a new user can get used to it in less than a minute.

Home page: http://www.passwordunlocker.com
Product page: http://www.passwordunlocker.com/products/zpu.html
Download page: http://www.passwordunlocker.com/downloads/zip_password_unlocker_trial.exe
Purchase page: https://www.regnow.com/softsell/nph-softsell.cgi?ss_short_order=true&items=19681-38&ss_cart_reset=true&quantity=1
How-to: http://www.passwordunlocker.com/products/how_to_use_zpu.html
Email: info@passwordunlocker.com

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm

Shenzhen, Guangdong -- (SBWIRE) -- 08/11/2009 -- RAR Password Unlocker 3.0 is released to meet the urgent need from users worldwide to recover RAR password to open and extract files from the RAR folder.

RAR Password Unlocker 3.0 is a professional solution to RAR password recovery. It is focused on the solely function to recover RAR password with speed and in an easy-to-use way. The program supports all RAR versions created by WinRAR with a speed over 220000 passwords per second on average.

Fueled with the three attack modes brute-force attack, brute-force with mask attack and dictionary attack, this password recovery tool stands out of its crowed in recovering long passwords! Short passwords can be recovered almost instantly. Brute-force with attack is especially helpful when recovering long passwords, as it allows you to offer password hints (define the password mask) to the program if you still remember part of the password such as digits, letters small or capitalized, special characters, etc. Thus reduces the calculation load of the program, reducing seeking scale and saving time. Moreover, dictionary attack makes the program customizable. A dictionary can be simply interpreted as the program's library to base on when seeking the password. If you get used to the program, you will find that the dictionary attack is the most effective way to recover the password, as you can create your own dictionary file listing your own frequently used password elements like character sets of your name, digits like 12, 123, 45, special characters like space, pond, dollar. If the program works based on this dictionary, it is no doubt to hugely strengthen the processing and to find the result in an unimaginably shorter time.

There are many functions for easier use. You can set the computer priority to increase the performance. While the program processing for the password, it supports to save the project every after a period of time (you can set the time) in order to resume the process the next time it is started if stopped accidently or intentionally this time. Additionally, the program supports to atuomatically shutdown the computer after the processing finishes, which is helpful, if you leave the program working away from the computer.

The best in RAR Password Unlocker 3.0 is it's easy to use. Compared to the prevailing similar products on the market, this program is smaller and simpler with solely one function to recover RAR password with super user-friendly interfaces! You don't have to be a computer guru and there is no professional knowledge and scaring terminologies for you to know, even a new user can fully manipulate it in less than a minute.

This is a newly released RAR password recovery tool by Password Unlocker , which is the world's leading company for password recovery tools!

Home page: http://www.passwordunlocker.com
Product page: http://www.passwordunlocker.com/products/rpu.html
Download page: http://www.passwordunlocker.com/downloads/rar_password_unlocker_trial.exe
Purchase page: https://www.regnow.com/softsell/nph-softsell.cgi?ss_short_order=true&items=19681-41&ss_cart_reset=true&quantity=1
How-to: http://www.passwordunlocker.com/products/how_to_use_rpu.html
Email: info@passwordunlocker.com

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm