I feel compelled to write about something I just found out yesterday. It was about a service that CloudFlare proudly touted as an innovation on web security technology — Keyless SSL. It allows CloudFlare, as a CDN provider, to “securely” serve content for the origin, with the origin’s own TLS certificate, but without requiring the origin to give up its private key. At first I was pleasantly surprised. If something can really be done it will with no doubt boost the security and even redefine how CDNs work today. … »
I guess I have finally lost my patience with C semantics. Although the C programming language is kind of infamous for its lack of memory safety and disastrous type system, I still believed that the programming language still represented intuition well, and given that an appropriate amount of attention is paid, all mistakes can be avoided. Well, turns out it is not the case when it comes to undefined behaviors. … »
The Greek island of Paxos has way too many mysteries, for both archaeologists and computer scientists. When I was first reading Dr. Leslie Lamport’s The Part-time Parliament, which was an epic introduction of a novel consensus protocol designed for distributed systems, I genuinely wondered who that group of archaeologists were and how Dr. Lamport managed to discover such perfect analogies between an ancient democracy and distributed computer systems. To be honest I almost planned my visit to the archaeology department myself. … »
Last week I was assigned the task to brute-force the MD5 hashing function in-order to demonstrate a SQL injection to the following PHP login handler:
// escaping username inputs, should be safe in most cases $username = mysql_real_escape_string($_GET['username']); // hashing the password input $password = md5($_GET['password'], true); $query = "SELECT * FROM `users` WHERE username='$username'". " AND password='$password';"; // searching for records $result = mysql_query($query, $dbh); if(mysql_num_rows($result) > 0) { echo "login successful! … »
Ubuntu released a newer version — version 12.10 after the LTS version of 12.04, which contains the latest version of GNU Compiler Collection (GCC) binaries. Nevertheless, I believe that a majority of people using Ubuntu are with 12.04 or even earlier versions, becasue the compatability problem is a huge headache for the Ubuntu platform sometimes. The latest release of GCC supports the powerful brandnew C++ 11 standard, making curiosity burn I believe for lots of folks. … »
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Programming and debugging is part of life for EECS students here in Michigan, and possibly also applies to anywhere else. Millions of tools have been introduced to make programming easier, and IDEs are just among a portion of them. Visual Studio and XCode by Microsoft and Apple are the two most famous IDEs in the software industry, whereas Eclipse platform reins the open-source world alone. … »