Find Jobs
Hire Freelancers

Cryptography OTR library

$750-1500 USD

Closed
Posted over 7 years ago

$750-1500 USD

Paid on delivery
Hello cryptographers, This job offer is only for the ones who already worked with OTR ! We need a Off-the-Record Messaging (OTR) - cryptographic protocol for messaging Application + API using a combination of AES symmetric-key algorithm with 256 bits key length. We are developing our own Messenger, which need to use the OTR encryption and OTR client library. The messenger is build in Java and C#. A side of the OTR cryptographic protocol API, we need you to setup also a secure XMPP server, with Openfire Administration. So basically: - OTR contacts library - 256-bit AES messaging encryption - Secure symmetric-key to encrypt messages - Secure symmetric-key to decrypt messages - Private zero-knowledge XMPP-server Budget is around $1000 We need it ready within one / two weeks.
Project ID: 11599967

About the project

11 proposals
Remote project
Active 7 yrs ago

Looking to make some money?

Benefits of bidding on Freelancer

Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
11 freelancers are bidding on average $1,581 USD for this job
User Avatar
Can help... I am an Expert... Lets Start! Please start a Discussion with me and we can get started from there... Please check the past projects I have handled and check my reviews for what employers have to say about my work... Can start right now...
$5,000 USD in 30 days
4.9 (33 reviews)
6.0
6.0
User Avatar
I am an IITK graduate, 9 year experienced software professional and I have got top notch developers in my team, who have got experience across a span of technologies. The members in my team have worked with top notch tech organization such as Amazon, Cisco, Oracle etc. We have been involved in similar projects in the past and our track record has been excellent.
$1,250 USD in 20 days
4.0 (25 reviews)
5.6
5.6
User Avatar
I have three years of experience in cryptography. I have developed security programs in both Java and C#. I'll have no trouble finishing your project on time.
$1,250 USD in 20 days
5.0 (1 review)
1.2
1.2
User Avatar
RAS Inforays Technologies (P) Ltd. is a Pune based Software Development Company. Serve IT services for various industries across the globe since 20th Oct 2006 with 100% Quality service. We have developed countless number of Web Applications, Custom Applications, Mobile Applications including CMS web design, Ecommerce, CRM, PMS, CRM, PMS, HRM, ERP, Helpdesk, Travel Portal, Real Estate, Jobs Portal, Payday Loan portal, Online Gaming, Online Betting, Online Lottery system and many more … Along with the Responsive Design & Development we also Provide Internet Marketing. SEO ( Search Engine Optimization ) , SMO ( Social Media Optimization ), Brand Promotion, PPC ( Pay Per Click ) to our valued client.
$1,250 USD in 20 days
0.0 (0 reviews)
0.0
0.0
User Avatar
Hello. Our company exists since 2014 and at the moment we are aimed on expansion abroad. We have already implemented more than 70 projects in Russia and CIS. And we are ready to take new projects and execute them on time. The price for the hour of work is low because we need references and to take projects as earlier as it possible.
$1,488 USD in 23 days
0.0 (0 reviews)
0.0
0.0

About the client

Flag of SPAIN
Den Haag, Spain
4.9
145
Payment method verified
Member since Jun 14, 2012

Client Verification

Thanks! We’ve emailed you a link to claim your free credit.
Something went wrong while sending your email. Please try again.
Registered Users Total Jobs Posted
Freelancer ® is a registered Trademark of Freelancer Technology Pty Limited (ACN 142 189 759)
Copyright © 2024 Freelancer Technology Pty Limited (ACN 142 189 759)
Loading preview
Permission granted for Geolocation.
Your login session has expired and you have been logged out. Please log in again.