About encryption and encryption methods Encryption gives you a way to protect sensitive documents contained in your archives. The contents of the files that you want to protect are encrypted by WinZip® Command Line Support Add-On based on a password that you specify. In order to later extract the original contents of the encrypted files, the correct password must again be supplied. The WinZip Command Line Support Add-On provides two basic encryption methods for Zip files: · AES encryption: AES is the Advanced Encryption Standard, which is the result of a three-year competition sponsored by the U.S. Government's National Institute of Standards (NIST). This encryption method, also known as Rijndael, has been adopted by NIST as a Federal Information Processing Standard. The add-on supports AES encryption in two different strengths: 128-bit AES and 256-bit AES. These numbers refer to the size of the encryption keys that are used to encrypt the data. 256-bit AES is stronger than 128-bit AES, but both of them can provide significantly greater security than the standard Zip 2.0 method described below. An advantage of 128-bit AES is that it is slightly faster, that is, it takes less time to encrypt or decrypt a file. The security of your data depends not only on the strength of the encryption method but also on the strength of your password, including factors such as length and composition of the password, and the measures you take to ensure that your password is not disclosed to unauthorized third parties. Please read about encryption passwords. Note that the Zip file format extension used by the WinZip Command Line Support Add-On to store AES-encrypted files is not supported by earlier versions of WinZip and is not yet supported by most other Zip file utilities. Because the technical specification for WinZip's AES format extension is available on the WinZip web site, we anticipate that other Zip file utilities will add support for this format extension. · Standard Zip 2.0 encryption: this older encryption technique provides a measure of protection against casual users who do not have the password and are trying to determine the contents of the files. However, the Zip 2.0 encryption format is known to be relatively weak, and cannot be expected to provide protection from individuals with access to specialized password recovery tools. You should not rely on Zip 2.0 encryption to provide strong security for your data. If you have important security requirements for your data, you should use WinZip's AES encryption, described above. The only advantage of Zip 2.0 encryption over the more secure AES encryption is that it is supported by most Zip file utilities, including earlier versions of WinZip. Files that you encrypt using this technique can be extracted by anyone who knows the correct password and has access to almost any Zip file utility. Some points to be aware of: · Encryption applies only to the contents of files stored within a Zip file. Information about an encrypted file, such as its name, date, size, attributes, and compression ratio, is stored in unencrypted form in the Zip file's directory and can be viewed, without a password, by anyone who has access to the Zip file. · The correct password must be specified before the contents of an encrypted file within a Zip file can be viewed or accessed in unencrypted form. The password is not required, however, for actions that do not require access to the unencrypted contents of the file. In particular, encrypted files can be deleted from a Zip file, or can be replaced within the Zip file, without a password. Please read about using encryption. Notes on encryption safety Encryption provides a measure of safety for your sensitive documents, but even encrypted documents can be compromised (regardless of whether they were encrypted by the WinZip Command Line Support Add-On or by other encryption software). Here are some of the ways this can occur. This is by no means an exhaustive list of potential risks; it is intended only to give you an idea of some of the safety issues involved with sensitive documents. · If a keystroke monitor or other malicious code (such as a virus) is running on your computer, your password may be recorded when you type it. Be sure to check frequently for viruses and follow other recommended computer safety procedures. · If you extract an encrypted file and then delete the file, it may be possible for someone to later "undelete" the file using file recovery software or the Recycle Bin. · When you open or view a decrypted file, the associated program may make one or more backup copies of the decrypted file. · When you "move" files to a Zip file by choosing the Move command, the add-on moves the files into the Zip file by compressing them and then deleting the original files from the disk. It may be possible to recover the original, unencrypted files from the disk. · After encrypting files, some or all of the unencrypted file contents may remain in your computer's memory or the page swap files on disk. A malicious user may be able to retrieve this unencrypted information from memory. · As described above, the add-on does not encrypt information about encrypted files such as their names, dates, etc. Any user with access to the Zip file can view this information without a password. You may be able to eliminate some of these exposures using specialized software such as virus scanners, disk erasers, etc. Technical information on AES key generation When you use AES encryption with WinZip, the passwords that you enter are converted into keys of the appropriate length (128 bits or 256 bits, depending on the AES key length that you specify). This is done through the PBKDF2 algorithm defined in RFC 2898 (also available as Public Key Cryptography Standard #5) with an iteration count of 1000. 8-byte salt values are used with 128-bit AES encryption and 16-byte salt values are used with 256-bit encryption. As part of the process outlined in RFC 2898 a pseudorandom function must be called; WinZip uses the HMAC-SHA-1 function for this purpose, since it is a well-respected algorithm that has been in wide use for this purpose for several years. The PBKDF2 function repeatedly calls HMAC-SHA-1, which produces a 160-bit hash value as a result, mixing the outputs in a fairly complicated way, eventually yielding a 128- or 256-bit encryption key as a result. Note that, if you are using 256-bit AES encryption, the fact that HMAC-SHA-1 produces a 160-bit result means that regardless of the password that you specify, the search space for the encryption key is unlikely to reach the theoretical 256-bit maximum, and cannot be guaranteed to exceed 160 bits. This is discussed in section B.1.1 of the RFC 2898 document. Information for software developers Zip file utility developers who wish to provide WinZip-compatible AES encryption support in their own products can find complete technical information at http://www.winzip.com/aes_info.htm. See also: Using Encryption The -s command enables encryption. By default, Zip 2.0 encryption is used. By specifying the -yc command after the -s command, the encryption method can be changed to one of the WinZip AES encryption methods. Examples: wzzip sample.zip -spassword *.txt All files with a .txt extension are added to the Zip file "sample.zip". The files are encrypted with Zip 2.0 encryption. They are encrypted using the specified password "password". wzzip sample.zip -s -yc *.txt All files with a .txt extension are added to the Zip file "sample.zip". The files are encrypted using WinZip's 128-bit AES encryption. A prompt will be generated requesting the password. wzzip sample.zip -s -ycAES256 *.txt All files with a .txt extension are added to the Zip file "sample.zip". The files are encrypted using WinZip's 256-bit AES encryption. A prompt will be generated requesting the password. Notes on using encryption The security of your data depends not only on the strength of the encryption method but also on the strength of your password, including factors such as length and composition of the password, and the measures you take to ensure that your password is not disclosed to unauthorized third parties. You should keep the following considerations in mind when choosing passwords for your files: · In general, longer passwords are more secure than shorter passwords. In fact, taking maximum advantage of the full strength of AES encryption requires a password of approximately 32 characters for 128-bit encryption and 64 characters for 256-bit encryption. · Passwords that contain a mixture of letters (upper and lower case), digits, and punctuation are more secure than passwords containing only letters. · Because you can use spaces and punctuation, you can create "pass phrases" that are long enough but still easy to remember and type. · Avoid using easily guessed passwords such as names, birthdays, Social Security numbers, addresses, telephone numbers, etc. Be sure to keep a record of the passwords you use and to keep this record in a secure place. The WinZip® Command Line Support Add-On has no way to access the contents of an encrypted file unless you supply the correct password. Copyright © 2004 WinZip Computing, Inc. All rights reserved. Copyright © 2004 WinZip Computing, Inc. All rights reserved.
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WinZip

Allgemeines

 Programme zur Kompression von Dateien und Verzeichnissen.

Modus

 Programm - Modus: Aufruf von WinZip unter Windows oder Linux. Kommando - Modus: In BAT-Dateien kann eine Folge von Zip- und Unzip-Aufträgen abgearbeitet werden. Hervorragend für Backup und Transfer. Alleinstellungsmerkmal von WinZip! Integrierter Modus: Im Explorer lassen sich ZIP-Daten öffnen, ohne das Programmfenster zu benutzen. Im WinCommander können auch Daten kopiert , hinzugefügt oder gelöscht werden. Bei USB-Sticks gibt es z.T. Probleme wegen des Speicherplatzes, weil WinZip bei Änderungen zunächst eine 2. Zip-Datei erstellt und dann erst die alte Datei löscht (doppelter Speicherbedarf).

Programm - Start

Nach dem Programmstart wird eine leere ZIP-Datei angezeigt.

neue Datei

Um ganze Verzeichnisse einzutragen, muss als Dateiname z.B. *.* eingetragen sein. Dann kann mit "Add with wildcards" der Eintrag gestartet werden. Bei geschachtelten Verzeichnissen "Include Subfolders" nicht vergessen.

Installation

 Wenn man keine Lizenz besitzt, so macht WinZip bei jedem Aufruf einen Hinweis, der bestätigt werden muss. Hat man eine Lizenz, so sollte man die Produktnummer eingeben, bevor man die Kommandozeilenfunktion installiert. Ansonsten bekommt man die lästige Meldung trotz freigeschalteter Lizenz.
Kompression Batch-Befehle: -u Update, -rP kompletten Pfad speichern, -t10.08.2011 Datumsschwelle Beispiel: WZzip -u -rp -t10.07.2012 -o Ziel.zip d:\Quelle\*.*
Zeitfenster Unter den Komprimierungstools kann nur WINZIP Dateien in einem Zeitfenster selektieren.
Dekompression
Dateiliste Anstelle einzelner Dateien kann im Batch der Name einer Dateiliste angegeben werden. WZzip -x@z_db.lst c:\\DBIV\*.*: z_db.lst enthält die Dateien, die nicht gesichert werden sollen (-x) z_db.lst. Die Dateiliste ist eine einfache Textdatei (Editor, nicht Word!!) mit der Endung .lst. Die Dateien werden zeilenweise eingegeben.
Versionen
  • Winzip Version 21: 11/16
  • Winzip Version 20.5: bis Win 8.1, 10,32- und 64 - Bit
  • Winzip Version 19: Cloud-Unterstützung, bis Win 8.1, 32- und 64 - Bit
  • Winzip Version 18
  • Winzip Version 17.5: 2013, 128- und 256-Bit AES-Verschlüsselung, WinZip Courier, Datenschutz in der Cloud
  • Winzip Version 16.5: 2012
  • WinZip Version 9.0: 2004
  • WinZip 8.0: 2000
  • WinZip 7.0: 1998
  • WinZip 6.2: 1995
  • WinZip 3.2: 1996
  • Zip 93: 1993
  • Zip 89: 1989
verschlüsselter Transfer Mit Batchmode kann WinZip aktuelle Dateien verschlüsselt auf einem USB-Stick sichern und übertragen.
Quellen 1.) http://www.winzip.com

2.) http://www.winzip.de

3.) http://www.info-zip.org
kostenlose Infos und Downloadadressen

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 Packer, Kompression Utilities Software

Impressum                           Zuletzt geändert am 15.01.2022 14:23