» Crypto http://www.megapanzer.com Fri, 30 Jul 2010 11:04:33 +0000 en hourly 1 http://wordpress.org/?v=3.0 A Second GSM Cipher Falls http://www.megapanzer.com/2010/01/12/a-second-gsm-cipher-falls/ http://www.megapanzer.com/2010/01/12/a-second-gsm-cipher-falls/#comments Tue, 12 Jan 2010 23:41:01 +0000 carrumba http://www.megapanzer.com/?p=3354 A group of cryptographers has developed a new attack that has broken Kasumi, the encryption algorithm used to secure traffic on 3G GSM wireless networks. The technique enables them to recover a full key by using a tactic known as a related-key attack, but experts say it is not the end of the world for Kasumi.

Kasumi, also known as A5/3, is the standard cipher used to encrypt communications on 3G GSM networks, and it’s a modified version of an older algorithm called Misty. The paper describing the new attack is not yet public, but the Emergent Chaos blog has a good description of the attack, including an excerpt from the abstract …

Read full article here.

]]> http://www.megapanzer.com/2010/01/12/a-second-gsm-cipher-falls/feed/ 0 Quantum Cryptography Cracked http://www.megapanzer.com/2009/12/31/quantum-cryptography-cracked/ http://www.megapanzer.com/2009/12/31/quantum-cryptography-cracked/#comments Thu, 31 Dec 2009 09:36:06 +0000 carrumba http://www.megapanzer.com/?p=3287

Quote from Bruce Schneiers page :

This presentation will show the first experimental implementation of an eavesdropper for quantum cryptosystem. Although quantum cryptography has been proven unconditionally secure, by exploiting physical imperfections (detector vulnerability) we have successfully built an intercept-resend attack and demonstrated eavesdropping under realistic conditions on an installed quantum key distribution line. The actual eavesdropping hardware we have built will be shown during the conference.
While I am very interested in quantum cryptography, I have never been optimistic about its practicality. And it’s always interesting to see provably secure cryptosystems broken.

Original post can be found here.

]]> http://www.megapanzer.com/2009/12/31/quantum-cryptography-cracked/feed/ 0 RC4Encryption : Encrypt and decrypt files with RC4 http://www.megapanzer.com/2009/06/09/rc4encryption-encrypt-and-decrypt-files-with-rc4/ http://www.megapanzer.com/2009/06/09/rc4encryption-encrypt-and-decrypt-files-with-rc4/#comments Tue, 09 Jun 2009 19:02:56 +0000 carrumba http://www.megapanzer.com/?p=2111 Tool name : RC4Encryption 0.1   Description : RC4Encryption is a tool to encrypt and decrypt files with the RC4 algorithm. The tool itself is not really hot stuff. OpenSSL supports RC4 since years and also many other algorithms. But you can use this code without any dependency of an additional library and you have working functions of stream cipher encryption.   Tested on : Windows XP   Feedback : In case you encounter any problems with the tool, you have suggestions to improve it, or you tested it with a Windows version i’ve not yet tested please drop me an email.   Downloads : Binary | Source   Screen shots :   ]]> http://www.megapanzer.com/2009/06/09/rc4encryption-encrypt-and-decrypt-files-with-rc4/feed/ 6