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Power Crypt - File Encryption
 Server Monitoring

 

General Instructions

Encrypting your sensitive files is easy with Power Crypt.  Just add your files and folders to the list and press the encrypt button.  It's that easy!

To decrypt your files you can add your files and folders to the list and press the decrypt button.


When you encrypt any  files Power Crypt renames the file with the file extension .crp

The icon for the encrypted file will change also, see screen shot below.

You can just double click the encrypted file and Power Crypt will open and prompt you for your password.  After the main screen loads your encrypted file will be shown in the list.  You can decrypt it by just pressing the decrypt button.

 

Program Configuration

 

General Settings
You can choose between two different encryption formats, 128 bit AES and 256 bit AES.


Password Settings
The password setting is important, because your files will be encrypted using your password as the key.  Select a good password!


Selecting Good Passwords

Easy-to-guess passwords offer hackers the possibility to enter a system. The object when choosing a password is to make it as difficult as possible for anyone to make educated guesses about what you've chosen as a password. This leaves them no alternative but a brute force search, trying every possible combination of letters, numbers, and punctuation. A search of this sort, even conducted on a machine that could try one million passwords per second, would require, on the average, over one hundred years to complete.

Never share your password with another user or make your password known to anyone else.

Examples of passwords that can easily be broken are:

Passwords that are made up of a word or name in English or any other language

Transferring letters or numbers for similar ones (e.g., zeros for o's)

Words with a number added to the beginning or end

Your login name in any form (as-is, reversed, capitalized, doubled, etc.)

Your spouse's or child's name

One of the most common passwords is 'password' never use it

One of the most common passwords used for testing a program or service is 'demo' never use it even when just testing a program or service, especially if you have submitted any personal information.

Any other information easily obtained about you. This includes license plate numbers, telephone numbers, social security numbers, the brand of your automobile, the name of the street you live on, etc.

A password of all digits, or all the same letter. This significantly decreases the search time for password cracking software.

Good passwords should be at least 6 characters and consist of both lower and upper case letters, numbers, and symbols. A good way to select a password is to choose a line or two from a song or poem, and use the first letter of each word.


 

Encryption Primer

 

There are four main encryption methods in use today.  They are explained below.

DESDES stands for Data Encryption Standard. This is an old algorithm that has been shown to be weak by today's standards.  It uses a short key and block size of 64 bits.  Short keys are bad, because they are susceptible to brute force attacks.   Another problem with DES is that it was purposely designed to be efficient in hardware and inefficient in software. This makes DES a relatively slow algorithm in any software implementation.

Triple DES – Triple DES is simply a strengthened version of DES. To strengthen the cipher, Triple DES runs the DES algorithm over the plain text three times, hence the "triple" in the name. It also offers stronger key lengths of 128 and 192 bits. However, it still uses a relatively weak block size of 64 bits. Another disadvantage of Triple DES is that, since it must perform the DES algorithm three times, it is a relatively slow cipher.

RC2 – RC2 is generally accepted as a good cipher and it has been around since the mid 1990s. It is also more than twice as fast as DES when implemented in software. However, it still uses a 64 bit block size and a key length (in the FCL implementation) of 40 to 128 bits in 8-bit increments.

Rijndael (a.k.a. AES) – Rijndael is the U.S. government's Federal Information Processing Standard (FIPS) Advanced Encryption Standard (AES) cipher algorithm. The names Rijndael and AES are used interchangeably in cryptography literature. Rijndael offers key lengths and block sizes of 128, 192 and 256 bits. One drawback of Rijndael is it's relative newness. Although it is highly recommended and considered strong by most cryptographers, a new cipher is one that has not withstood the same scrutiny and test of time as an older, more seasoned cipher. Newness not withstanding, the available 256-bit key and block lengths and it's acceptance as a government standard lead me to favor this cipher and I would recommend this cipher.


 

 

 

 

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