freebsd-ports/security/pkcrack/distinfo

MD5 (pkcrack-1.2.2.tar.gz) = 41e2037ceb95fc0717f7d9ae0abe10db
SHA256 (pkcrack-1.2.2.tar.gz) = 4d2dc193ffa4342ac2ed3a6311fdf770ae6a0771226b3ef453dca8d03e43895a
SIZE (pkcrack-1.2.2.tar.gz) = 174208
This package implements an algorithm for breaking the PkZip cipher that was devised by Eli Biham and Paul Kocher. This program applies a known plaintext attack to an encrypted file. A known-plaintext-attack recovers a password using the encrypted file and (part of) the unencrypted file. Please note that cryptographers use the word 'plaintext' for any kind of unencrypted data - not necessarily readable ASCII text. Before you ask why somebody may want to know the password when he already knows the plaintext think of the following situations: - Usually there's a large number of files in a ZIP-archive. Usually all these files are encrypted using the same password. So if you know one of the files, you can recover the password and decrypt the other files. - You need to know only a part of the plaintext (at least 13 bytes). Many files have commonly known headers, like DOS .EXE-files. Knowing a reasonably long header you can recover the password and decrypt the entire file. WWW: http://www.unix-ag.uni-kl.de/~conrad/krypto/pkcrack.html PR: ports/84192 Submitted by: Emanuel Haupt <ehaupt@critical.ch> 2005-07-28 12:32:17 +02:00			`MD5 (pkcrack-1.2.2.tar.gz) = 41e2037ceb95fc0717f7d9ae0abe10db`
Add SHA256 hashes to my ports 2005-11-30 15:01:14 +01:00			`SHA256 (pkcrack-1.2.2.tar.gz) = 4d2dc193ffa4342ac2ed3a6311fdf770ae6a0771226b3ef453dca8d03e43895a`
This package implements an algorithm for breaking the PkZip cipher that was devised by Eli Biham and Paul Kocher. This program applies a known plaintext attack to an encrypted file. A known-plaintext-attack recovers a password using the encrypted file and (part of) the unencrypted file. Please note that cryptographers use the word 'plaintext' for any kind of unencrypted data - not necessarily readable ASCII text. Before you ask why somebody may want to know the password when he already knows the plaintext think of the following situations: - Usually there's a large number of files in a ZIP-archive. Usually all these files are encrypted using the same password. So if you know one of the files, you can recover the password and decrypt the other files. - You need to know only a part of the plaintext (at least 13 bytes). Many files have commonly known headers, like DOS .EXE-files. Knowing a reasonably long header you can recover the password and decrypt the entire file. WWW: http://www.unix-ag.uni-kl.de/~conrad/krypto/pkcrack.html PR: ports/84192 Submitted by: Emanuel Haupt <ehaupt@critical.ch> 2005-07-28 12:32:17 +02:00			`SIZE (pkcrack-1.2.2.tar.gz) = 174208`