tag:blogger.com,1999:blog-88207847177839599792011-10-12T12:23:13.069+03:00Turkey's largest security group now knows as Defcon TurkeyDefcon Turkeyhttp://www.blogger.com/profile/12673957932358394945noreply@blogger.comBlogger31100tag:blogger.com,1999:blog-8820784717783959979.post-41676474008661839032013-07-05T23:32:00.003+03:002009-07-05T23:22:39.146+03:00Defcon (Defense Condition) 1993 yılında başlatılmış uluslararası bir oluşumdur. Defcon Türkiye ekibi olarak hedefimiz, Türkiye içinde güvenlik konusuyla ilgilenen insanların tanışabileceği ve bilgilerini paylaşabileceği bir oluşum olmaktır.<div><br /></div><div>Her ay düzenli olarak yapılacak toplantılarda, gruptan bir kişi uzman olduğu konuda bilgi paylaşımında bulunacaktır.<br /> <div><br /></div><div>Mail grubuna dahil olmak istiyorsanız, <span class="Apple-style-span" style=" -webkit-border-horizontal-spacing: 10px; -webkit-border-vertical-spacing: 10px; font-family:arial;font-size:13px;"><a href="http://groups.google.com/group/defcon-turkey" style="color: rgb(85, 26, 139); ">http://groups.google.com/group/</a><b><a href="http://groups.google.com/group/defcon-turkey" style="color: rgb(85, 26, 139); ">defcon-turkey</a> </b><span class="Apple-style-span" style="font-size:medium;"><span class="Apple-style-span" style="font-family:georgia;">adresinde üyelik için istekte bulunabilirsiniz.</span></span></span></div><div><span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 10px; -webkit-border-vertical-spacing: 10px;"><br /></span></div></div><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8820784717783959979-4167647400866183903?l=defcon-turkey.blogspot.com' alt='' /></div>Berkhttp://www.blogger.com/profile/05986762443265696347noreply@blogger.com0tag:blogger.com,1999:blog-8820784717783959979.post-76445037791297821082011-09-10T18:13:00.002+03:002011-09-10T18:16:38.463+03:00<span style="font-size:85%;"><b><span style="font-family:Arial;color:#000000;">Cryptovirology is a field that studies how to use cryptography to design powerful malicious software. The field was born with the observation that public-key cryptography can be used to break the symmetry between what an antivirus analyst sees regarding a virus and what the virus writer sees. The former only sees a public key whereas the latter sees a public key and corresponding private key. The first attack that was identified in the field is called "cryptoviral extortion". In this attack a virus, worm, or trojan hybrid encrypts the victim's files and the user must pay the malware author to receive the needed session key (which is encrypted under the author's public key that is contained in the malware) if the user does not have backups and needs the files back. The field also encompasses covert attacks in which the attacker secretly steals private information such as private keys. An example of the latter type of attack are asymmetric backdoors. An asymmetric backdoor is a backdoor (e.g., in a </span></b></span><a href="http://www.cryptovirology.org">http://www.cryptovirology.org</a><span style="font-size:85%;"><b><span style="font-family:Arial;color:#000000;">)</span></b></span><span style="font-size:85%;"><b><span style="font-family:Arial;color:#000000;"> that can be used only by the attacker, even after it is found. This contrasts with the traditional backdoor that is symmetric, i.e., anyone that finds it can use it. Kleptography, a subfield of cryptovirology, is concerned with the study of asymmetric back doors in key generation algorithms, digital signature algorithms, key exchanges, and so on.</span></b></span><br /> <a href="http://www.cryptovirology.org/"></a><br />http://www.cryptovirology.org<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8820784717783959979-7644503779129782108?l=defcon-turkey.blogspot.com' alt='' /></div>Defcon Turkeyhttp://www.blogger.com/profile/12673957932358394945noreply@blogger.com2tag:blogger.com,1999:blog-8820784717783959979.post-42483802904447498812009-07-05T23:01:00.009+03:002011-09-10T18:13:00.376+03:00<b>Haramitsu</b><br /><div>Security Specialist</div><div>Istanbul, Turkey</div><div>Field: <b>Infosec Guy</b></div><div>deviloflaplace@gmail.com<br /><br />PaSa<br /></div><b></b><div>Software Engineer<br /><div>Coventery, England</div><div>Field: <b>iPhone Security</b></div><div>selcuk@gorgulu.com</div><div><br /></div><div><b>Phytian</b></div><div>Computer Scientist</div><div>Istanbul, Turkey</div><div>Field: <b>Internet Technology &amp; Security</b></div><div>phytian@csexploits.com</div><div><br /></div><div><b>Coding</b></div><div>Software Engineer</div><div>Adana, Turkey</div><div>Field: <b>Computer Security - General</b></div><div><br /></div><div><b>ByRodi</b></div><div>Software Engineer</div><div>Ankara, Turkey</div><div>Field: <b>Computer Security - General</b></div><div>byrodi@anti-av.org</div><div><br /></div><div><b>Deathless</b></div><div>Social Engineer</div><div>Konya, Turkey</div><div>Field: <b>Social Engineering</b></div><div>detlis@hotmail.com<br /><br /><span style="font-weight: bold;">Uykusuz</span><br />Social Engineer<br />Giresun, Turkey<br />Field: <span style="font-weight: bold;">Web Security</span><br />undetecting@hotmail.com<br /></div></div><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8820784717783959979-4248380290444749881?l=defcon-turkey.blogspot.com' alt='' /></div>Berkhttp://www.blogger.com/profile/05986762443265696347noreply@blogger.com0