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  • Best practice for secure socket connection.

    - by LnDCobra
    What is the best practice for a secure socket connection (without SSL). I will be moving sensitive data (logins/passwords/accounts) across TCP Socket connection, and wondering if there is a good/fast way of Encrypting/Decrypting and avoiding malicious injection.

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  • Authentication Sceme for RESTful API used by desktop app.

    - by user346087
    I'm providing a RESTful API. This API is used by a third party desktop application. The API is currently secured using Basic Authentication. That isn't very secure because the credentials have to be stored in the client application. The communication between the desktop and API can also easily be intercepter. The desktop application also communicates with a third party server (run by the publisher of the desktop application) I am unable to figure out how the secure the API in a good way. Ideas?

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  • SQL injection attempt on my server

    - by Jan Kuboschek
    I know a little about SQL injections and URL decode, but can someone who's more of an expert than me on this matter take a look at the following string and tell me what exactly it's trying to do? Some kid from Beijing a couple weeks ago tried a number of injections like the one below. %27%20and%20char(124)%2Buser%2Bchar(124)=0%20and%20%27%27=%27

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  • Url rewriting : prevent to display xml

    - by Frank
    Edit : I've got an aspx file (default.aspx) that loads a flash file (index.swf), but this swf needs a xml file (foo.xml) to load correctly. However, I would like to block any request aiming directly at the xml file. Is it possible, using a rewritting engine (isapi_rewrite for example) to detect if the xml file is being 'hotlinked' or being loaded by the 'index.swf'(inside default.aspx)? Any ideas? Thank you.

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  • Is it possible to password protect an SQL server database even from administrators of the server ?

    - by imanabidi
    I want to install an application (ASP.Net + SQL server 2005 express) in local network of some small company for demo but I also want nobody even sysadmin see anything direct from the database and any permission wants a secure pass . I need to spend more time on this article Database Encryption in SQL Server 2008 Enterprise Edition that i found from this answer is-it-possible-to-password-protect-an-sql-server-database but 1.I like to be sure and more clear on this because the other answer in this page says : Yes. you can protect it from everyone except the administrators of the server. 2.if this is possible, the db have to be enterprise edition ? 3.is there any other possible solutions and workaround for this? thanks in advance

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  • Securing database keys for client-side processing

    - by danp
    I have a tree of information which is sent to the client in a JSON object. In that object, I don't want to have raw IDs which are coming from the database. I thought of making a hash of the id and a field in the object (title, for example) or a salt, but I'm worried that this might have a serious effect on processing overhead. SELECT * FROM `things` where md5(concat(id,'some salt')) = md5('1some salt'); Is there a standard practice for obscuring IDs in this kind of situation?

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  • Should I convert overly-long UTF-8 strings to their shortest normal form?

    - by Grant McLean
    I've just been reworking my Encoding::FixLatin Perl module to handle overly-long UTF-8 byte sequences and convert them to the shortest normal form. My question is quite simply "is this a bad idea"? A number of sources (including this RFC) suggest that any over-long UTF-8 should be treated as an error and rejected. They caution against "naive implementations" and leave me with the impression that these things are inherently unsafe. Since the whole purpose of my module is to clean up messy data files with mixed encodings and convert them to nice clean utf8, this seems like just one more thing I can clean up so the application layer doesn't have to deal with it. My code does not concern itself with any semantic meaning the resulting characters might have, it simply converts them into a normalised form. Am I missing something. Is there a hidden danger I haven't considered?

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  • Is this a secure way to structure a mysql_query in PHP

    - by Supernovah
    I have tried and tried to achieve an SQL injection by making custom queries to the server outside of firefox. Inside the php, all variables are passed into the query in a string like this. Note, by this stage, $_POST has not been touched. mysql_query('INSERT INTO users (password, username) VALUES(' . sha1($_POST['password']) . ',' . $_POST['username'] . ')); Is that a secure way to make a change?

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  • refresh a <ui:composition when j_security_check connection interrupted (http 408)

    - by José Osuna Barrios
    I have a "j_security_check connection interrupted (http code 408)" and proposed solution is <meta http-equiv="refresh" content="#{session.maxInactiveInterval}"/> by http://stackoverflow.com/a/2141274/1852036 but my page structure is a composition using a template.xhtml and a view.xhtml like a <ui:composition: my template.xhtml: <html ... <f:view ... <h:body ... <ui:insert name="content"> ... my view.xhtml to refresh when session.maxInactiveInterval <ui:composition ... <ui:define name="content"> ... may anyone help me to do this? I want to refresh this <ui:composition view, I can't use <meta http-equiv="refresh" content="#{session.maxInactiveInterval}"/> on template.xhtml because it's used by several views

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  • Why not use HTTPS for everything?

    - by Malfist
    If I was setting up a server, and had the SSL certificate(s), why wouldn't I use HTTPS for the entire site instead of just for purchases/logins? I would think it would make more sense just to encrypt the entire site, and protect the user entirely. It would prevent problems such as deciding what has to be secured because everything would be, and it's not really an inconvenience to the user. If I was already using an HTTPS for part of the site, why wouldn't I want to use it for the entire site?

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  • How can I add one line into all php files' beginning?

    - by Tom
    So, ok. I have many php files and one index.php file. All files can't work without index.php file, because I include them in index.php. For example. if somebody click Contact us the URL will become smth like index.php?id=contact and I use $_GET['id'] to include contacts.php file. But, if somebody find the file's path, for example /system/files/contacts.php I don't want that that file would be executed. So, I figured out that I can add before including any files in index.php line like this $check_hacker = 1 and use if in every files beginning like this if($check_hacker <> 1) die();. So, how can I do it without opening all files and adding this line to each of them? Is it possible? Because I actually have many .php files. And maybe there is other way to do disable watching separate file? Any ideas? Thank you.

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  • password limitations in SQL Server and MySql

    - by asteroid
    Does MySql 5.1 and SQL Server 2008 (Web edition, Standard) have any functional password limitations other than length limits? Are metacharacters in any form a bad idea to use, like bang, pipe, hash, any slash, carrot, and so on? I know that MySql 5.1 has a password length limitation of 16 characters that is hardcoded, but I was wondering, are any metacharacters (i.e. non alphanumerics) a bad idea to use? And is this true in SQL Server 2008 Web edition, Standard? So specifically: can symbols like: /`~:}{[]^ be used successfully? I would hope it doesn't matter to the database, but I don't understand enough about password storage in enterprise database systems yet to know for sure, and I was looking for confirmation or an explanation.

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  • Permission based access control

    - by jellysaini
    I am trying to implement permission based access control in ASP.NET. To implement this I have created some database tables that hold all the information about which roles are assigned what permissions and which roles are assigned to what user. I am checking the permissions in the business access layer. Right now I have created a method which checks the permissions of the user. If the user has permissions then okay otherwise it redirects to another page. I want to know if the following things are possible? class User { [PremissionCheck(UserID,ObjectName,OperationName)] public DataTable GetUser() { //coding for user } } I have seen it in MVC3. Can I Create it in ASP.NET? If yes then how can I implement it?

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  • Are sessions modifiable by the client/user?

    - by Sev
    In my PHP Web-App I use sessions to store the user's data. For exmaple, if a user logs in, then an instance of the User class is generated and stored in a Session. I have access levels associated with each user to determine their privileges. Store the user in a session by: $_SESSION['currentUser'] = new User($_POST['username']); For example: if($_SESSION['currentUser'] -> getAccessLevel() == 1) { //allow administration functions } where getAccessLevel() is simply a get method in the User class that returns the _accesslevel member variable. Is this secure? Or can the client somehow modify their access level through session manipulation of some sort?

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  • Rewriting Live TCP/IP (Layer 4) Streams

    - by user213060
    I want to rewrite TCP/IP streams. Ettercap's etterfilter command lets you perform simple live replacements of TCP/IP data based on fixed strings or regexes. Example: if (ip.proto == TCP && tcp.dst == 80) { if (search(DATA.data, "gzip")) { replace("gzip", " "); msg("whited out gzip\n"); } } if (ip.proto == TCP && tcp.dst == 80) { if (search(DATA.data, "deflate")) { replace("deflate", " "); msg("whited out deflate\n"); } } http://ettercap.sourceforge.net/forum/viewtopic.php?t=2833 I would like to rewrite streams based on my own filter program instead of just simple string replacements. Anyone have an idea of how to do this? Is there anything other than Ettercap that can do live replacement like this, maybe as a plugin to a VPN software or something? The rewriting should occur at the transport layer (Layer 4) as it does in this example, instead of a lower layer packet-based approach. Thanks!

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  • What is the best nuclear missile crypto system?

    - by The Rook
    You are on a submarine and there is an encrypted message that you want to read. Two people must use their keys at the same time in order to obtain the plain text. What is best cryptographic primitive to use? Are the following two implementations suitable? plain_text=decrypt(Key1 XOR key2,ciper_text,IV) plain_text=decrypt(Key1,rc4_encrypt(key2,ciper_text,IV2),IV1)

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  • How can I gain root access on a Mac OS X system without wiping the OS?

    - by Richard T
    My father died recently and I've inherited his Mac. I'd love to put it to use in my own life, but I don't want to wipe its brains out just so I can reconfigure it to use in my network, etc. His old files are historically important to me—I trust you can understand my desire to keep them. I can log in as I had an account on the machine before he passed, but that's about it.

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  • Prevent Apache from answering invalid requests

    - by nickdnk
    I have an Apache web-server that acts as a web front-end for iPhone and iPad applications that communicate by POST and JSON only. Is there any way to prevent Apache from answering requests that are invalid? I can see my error log is filled with attempts to open files such as /admin.php /index.php etc - files that don't exist on my server. I believe this is possible with IIS, but can you do the same thing with Apache? Basically I want the request to appear timed out unless you post exactly the right content to the right file - or at least if you do not request an existing file. This would make the server appear non-existing to everyone but my iPhone users as all communication is SSL and directories are not really guess-able. I did disable the ServerTokens and all that, but I still get File not found etc. when I access the server requesting a random file, which is what these bots do constantly.

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