Hvordan kryteres zip-filer med passord i windows?

[ATWindsor]

Windows XP har en innebygget funksjon for å zippe filer, her kan man også lage passord. Hvordan blir isåfall filene kryptert? Fant ikke noe særlig info noår jeg prøvde å søke, åpner jeg fila i winrar står det bare at den er beskyttet, men ikke hvordan. Er krypteringen som brukes sikker?

 

AtW

[KingDingLing]

The encryption for the Zip component is determined by the Encryption property: 0 = none, 1 = blowfish, 2 = twofish, 3 = rijndael (AES). There is also a Zip.EncryptKeyLength property that can be set to either 128, 192, or 256 to get up to 256-bit encryption. One important note: the PasswordProtect property is separate from the Encryption property. If it is set, you get the older (more standard) Zip password protection, which is not very secure. To get AES encryption, you would leave PasswordProtect off, but set the Encryption property to 3 (AES).

 

I find both BZip2 and Zip compression to be very similar in performance, so in my opinion, either is fine. When using the Zip AES Encryption, the cipher mode is "CBC" (Cipher Block Chaining) and NOT ECB. The IV is effectively all zeros. If these parameters need to be changed, you would have to use the Crypt component.

 

REF