Client-side refers to operations that are performed by the client in a client–server relationship in a computer network.

learn more… | top users | synonyms

0
votes
5answers
970 views

What voip client support manual encryption?

In pidgin there is a plugin that we can use to encrypt our messages in chat windows .. Is there anything simular for voip (pc to pc) ? any client that support manual encryption for voice data?(linux)
5
votes
2answers
1k views

Is it safe to use createHTMLDocument to sanitize HTML?

i'm wondering how safe it is to use createHTMLDocument to do HTML sanitization. I've tried to implement it like this: function sanitize(string) { var elm = ...
2
votes
1answer
3k views

Correct way to perform secure two way encryption on a web site

I'm currently working a project that requires me to store sensitive information (mainly passwords and other information) on a web server via a standard python/flask website. This information is to be ...
4
votes
2answers
763 views

How to implement client side encryption for CalDav & CardDav content?

I'm looking for a client-side encryption implementation that would be able to secure CardDav & CalDav data so that they couldn't be compromised even by the hosting provider. Server side: PHP or ...
1
vote
2answers
128 views

Creating an application in which all user content is encrypted

Does any one have references or sources on how to approach developing a web application in which the content is encrypted and unreadable for the developers or company owners; I'm referring to content ...
2
votes
2answers
318 views

How can one find keyloggers in javascript?

Assuming no XSS and a client-side only page, how can a keylogger be identified in javascript code? Should I simply look for the id of the targeted fields and possibly some sort of DOM traversal to ...
0
votes
2answers
290 views

How can a keylogger gather & transmit data from a client-only webapp run from file?

For a client-side only webapp run from file, how can a keylogger gather data and then transmit it? In this scenario, please limit the scope to the client code only, that an attacker somehow has ...
29
votes
4answers
7k views

How secure are my passwords in the hands of Firefox using a Master Password?

I'm relying on Firefox to remember my passwords, using a Master Password of more than 25 characters. How secure is this set-up?
0
votes
2answers
3k views

client SSL authentication .pem file and .crt files

So I have minimal knowledge of security really but I'm a primary developer on an application which handles some sensitive data that we want to be secure. The application communicates with one other ...
2
votes
1answer
5k views

How is the Premaster secret used in TLS generated?

I believe that it uses some combination of the random values sent in the hello messages. From RFC 2246: (TLSv1.0) RSA encrypted premaster secret message Meaning of this message: If RSA is ...
0
votes
1answer
38 views

Can JS templates for admin-only pages be public

In my page admins-only section is very responsive, so I have to use both server and client side templating. Obviously server side templates are stored outside of web-root and routing takes care of ...
2
votes
2answers
197 views

Client Authentication Certificate Not Expiring, but “parent” cert IS

So I have a client-authencation cert installed on client PCs, which doesn't expire for 5 more years. Unfortunately, the cert on our gateway which is used to validate the client cert, expires this ...
3
votes
1answer
141 views

How to (programmaticaly or by other means) encrypt or protect customer data

I am working on a web project and I want to (as far as possible) handle user data in a way that reduces damage to the users privacy in case of someone compromising our servers/databases. Of course we ...
2
votes
1answer
177 views

What should a client verify after getting a client certificate?

I have a client that generates a csr, sends it to a server, the server then sign it and return the certificate as a String. the String is then decoded to a x509Certificate (using Bouncycastle's ...
3
votes
2answers
97 views

Is letting just anybody see the appearance/html/javascript of your admin pages a security risk?

Ok so consider the scenario in which you have two projects, one is a RESTful API, and the other is a public facing website. The API uses cookie/token based authentication, and contains all of the ...
0
votes
2answers
160 views

For a computer client, is physical security the most important measure?

Is being online all the time the root of all evil, when it comes down to private computer clients security? Would a not-always-connected-to-the-internet system, solve most of our problems? In a ...
2
votes
2answers
2k views

XSS in HTML meta tag

There is a web application which contains a search function. When I search for aaaaaaaaxss I get this: <meta property="the:property" content="100 Results for aaaaaaaaxss (Page 1)" /> It strips ...
5
votes
1answer
1k views

Is 'Forge' Javascript crypto library secure? [closed]

I need a client-side crypto library. I've seen https://github.com/digitalbazaar/forge linked many times on stackexchange. Forge seems to be the most complete and well-documented crypto library for JS. ...
0
votes
2answers
874 views

Heartbleed client side attack: What can the attacker obtain? [duplicate]

If I have got this right in my head it would be a simple enough task to combine arp spoofing on a public WiFi to redirect clients to an evil SSL server which sends malformed heartbeat requests or to ...
4
votes
4answers
3k views

How to securely share key between two remote devices?

Assuming I have a server/client topology, currently I'm facing the problem that I want to generate some key on the client side and somehow make the remote server get it securely. I'm using AES on ...
1
vote
1answer
214 views

Review of approach to client-side only hashing and encryption for web application

Background: I have little knowledge of hashing and encryption, so please bear with me. I have posted a related question here: ...
0
votes
1answer
493 views

What are the risks of connecting via VNC to an untrusted host?

There are questions about connecting to an untrusted host via SSH [1] [2], RDP, and with X11 forwarding enabled. What about when connecting via VNC? What risks are there to the client? To be clear: ...
1
vote
2answers
851 views

Digital Signatures of XML, PDF and Office Documents on every platform

I'm trying to develop a website that performs digital signatures on client-side and then sent the signed document to the server-side. I want to do the signatures on client, due to the fact of not ...
1
vote
1answer
110 views

Digitally signed scripts as a way to thwart XSS

As a blanket approach to dealing with XSS attacks, rather than having to remember to escape user-generated code, is there a way to instruct the browser not to execute any script or script-function ...
0
votes
1answer
242 views

Why not use client certificates for premaster key generation

The question is about a very specific SSL handshake scenario. I understand that some servers may request client certificates in order to authenticate connecting clients. However, as far as I can ...
0
votes
0answers
26 views

How can it be possible to have encrypted communication between a server and a client if the server has only a public key [duplicate]

If only the server has an electronic certificate (User ID, Version, Public key), how can be possible the encrypted communication between the client and the server?
12
votes
4answers
2k views

Preventing reverse-engineering of client application

I have a web service which is used by a Flash client. Both the service and the Flash client is produced by me (read: my company). The Flash client communicates with the server over HTTPS. One of the ...
0
votes
3answers
298 views

What are the MitM implications of a stolen client-side private key?

Many VoIP handsets support client-side SSL authentication for auto-provisioning. Unfortunately, some devices must be programmed with their client-side keys. (Keys generated on low-entropy devices are ...
29
votes
3answers
11k views

What useful things can I do with the html5 “keygen” element?

There's a new* keygen element in the html5 spec. It's supported in major browsers excepting Internet Explorer and Safari. Here's what it looks like: <form action="processkey.cgi" method="post" ...
1
vote
1answer
270 views

What are the implications of storing sensitive data in bookmarklets?

While discussing alternatives for asking the browser to remember your password, one guy suggested using a bookmarklet to store users' credentials. The original answer is in portuguese, but I'll ...
2
votes
2answers
682 views

Ways to authenticate client with a server

I have an app that sends an encrypted message to the server, with the sender and recipient username attached. The usernames are each linked to a unique device ID that allows messages to be sent to ...
2
votes
5answers
8k views

How to validate a client certificate

My understanding is that when using a client certificate for security one issues a private and public key cert (for example X509) of some sort and sends that of to the consumer of the service that one ...
7
votes
2answers
3k views

Risks of client-side encryption using Stanford Crypto Library

I'm building a simple web application for encrypted chat. Each message will undergo 256-bit AES encryption on the client side, using the Stanford Javascript Crypto Library. No unencrypted data or ...
10
votes
2answers
3k views

How to protect against clickjacking attack but allow legit iframes?

I'm aware of modern anti-clickjacking approaches, such as X-Frame-Options header or framekiller scripts. But all these tactics prevent content to be inside iframe. But what if there is a requirement ...
1
vote
2answers
83 views

How to detect changes to client

I am developing a Java game and money is involved. As such, I want to prevent people from modifying the client if at all possible (I'm a game designer, not a security expert). I know that it is ...
5
votes
1answer
6k views

Is it safe to give an Oauth token to client side javascript so it can directly make requests to a server?

I currently have a simple backbone.js application served from my domain (example.com), which is provided an Oauth token. Specifically, I pass the Oauth token through my page template into the ...
0
votes
1answer
284 views

How to use clipboard manager software more securely?

I want to minimize the risks using a clipboard manager or clipboard history software. I want to use it because it really eases my work so not using it is not a good option. These programs usually ...
2
votes
1answer
107 views

Possible to redact information in the clipboard, or to auto-redact when it hits a webpage?

Sometimes when I paste information to a website I realize after I post the information that I inadvertently included an IP address, username, email address, or other information I'd like to consider ...
6
votes
4answers
857 views

Secure authentication: partial client-side key stretching… please review/criticize my idea

I am trying to figure out what would be the 'perfect' authentication system for a website. On one end, we know that simple hashing algorithms can be brute-forced or cracked in other ways. Hence why ...
3
votes
1answer
1k views

SQLMap: How to test JavaScript generated field names?

I have a pretty simple HTML page that submits a username and password to the server via POST method: <doctype html> <head> <title>SQLMap dynamic parameters</title> ...
11
votes
5answers
3k views

How can I securely authenticate the client application sending me data?

We have a web service logging/recording user data sent over https by our client application. Is there a way to securely ensure that the data is getting sent by the client application and not by a fake ...
3
votes
3answers
6k views

Disabling SSL v2 and weak ciphers on client PC's

Is it a requirement to also disable SSL v2 and weak ciphers on client PC's? I have seen quite a few posts for disabling them on servers, but nothing about a regular client PC, say, running Windows XP ...
13
votes
3answers
574 views

Can I use the same password both for SRP and for client-side encryption?

Suppose a less-than-trusted server is used to store users' confidential data (encrypted at the client side), and both tasks - authentication and encryption/decryption - should be doable with a single ...
6
votes
2answers
9k views

Certificate Chain checking

I have a very specific question. A client verifies a sever by taking the certificate and checking specific values and that the digital signature of the intermediate CA is correct (According to the ...
6
votes
2answers
666 views

Client-side attacks with custom malware in penetration tests

I regularly perform pen-tests against web applications, operating systems, etc. Occasionally, I'm luck enough to do a 'red-teaming' exercise and get to attack at all conceivable points of a network ...
2
votes
4answers
651 views

Does Disabling Right Click In Windows Explorer Do Anything?

I am at a student at a school which blocks the right click in Windows Explorer and the desktop, as well as on the taskbar. I don't exactly understand why they do this, since most of the commands on ...
1
vote
3answers
849 views

Why one time passwords using nested hash chain are not used?

I am wondering, why web sites do not use one-time passwords generated by hash chain. By that I mean that a client chooses a secret and after being salted, he applies some secure hash function F() on ...
5
votes
2answers
1k views

Web & insecure HTTP - Using RSA for encrypting passwords on the client side

I used client side password hashing in my register and login project. Its purpose is to prevent passive adversaries/eavesdroppers from discovering users' plaintext passwords when HTTP requests are in ...
8
votes
1answer
6k views

Drawbacks of storing an authentication token on the client side?

I am working on an ASP.NET MVC web application, which fetches its data from an API in the back. So authentication is currently done via ASP.NET Forms Authentication, which means the client sends email ...
2
votes
1answer
948 views

Vulnerabilities in Host Proof Hosting

I've recently been doing some research on Host-Proof Hosting, specifically in a web app environment. It seems like a pretty rock solid method of security, but I'm certainly not a security expert and ...