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Customization of LinPhone SIP / VoIP Client

We are in a need of a customization of the opensource VoIP / SIP client LinPhone.

The development has to be done in two phases:

Phase 1: Customization of mobile + tablet apps (iOS + Android)

// Objective C = iOS + Java = Android --> ready in two weeks.

Phase 2: Customization of PC apps (Windows, Mac OSX and Linux)

// Qt/QML = Windows, Mac OSX and Linux --> ready in four weeks.

The main customization's must be:

- Upgrade security

Many security features, which include i.e.:

--> Use TLS connectivity for handshake

--> Use VPN connection for additional security

--> Use ZRTP encryption protocol on VoIP (voice and video) communication

--> Use text encryption for messaging and file sending

--> Database security on app and server

--> Secure connection settings

--> Use code obfuscation protection + Sign the app

--> Harden the security of application / program

--+ Encrypt the entire application

--+ Containerize the entire application

--+ Encrypt the database

--+ Lock screen / Login protection

--+ Brute force protection

--+ Code hardening by Pro+iX Guard

--+ Store encryption keys securely in Trusty

--> Set privacy settings

- Design customization

Many security features, which include i.e.:

All designs are based upon the operation of LinPhone, almost no real custom development.

--> Add a lock screen / login screen prior using app

--> Every function in the LinPhone app is customized by designer

--> APP settings are blocked for users to change - one setting fits all

--> Custom user account settings

SIP server will be setup by an other person if this isn't your specialty to save time and costs.

Budget $750 - $1000 for entire project.

Ready in 2 - 4 weeks (divided in two phases)

Skills: Android, C Programming, C++ Programming, Java, Mobile App Development

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About the Employer:
( 137 reviews ) Den Bosch, Spain

Project ID: #17971232

10 freelancers are bidding on average $836 for this job

$555 USD in 10 days
(74 Reviews)
7.5
wuyong2020

Hi I have rich experiences with Linphone and Sip client server. This project is perfect fit with my skill set. Hope to discuss more details with you. Regards

$588 USD in 10 days
(42 Reviews)
7.2
$555 USD in 10 days
(42 Reviews)
7.2
unikinfoways1

Hello Sir, Hope you are doing well... I have read your requirement and understood that you are looking for a Customization of LinPhone SIP / VoIP Client. I have read your requirement and understood features an More

$1000 USD in 60 days
(14 Reviews)
5.1
luiswilliam

Hello, I read your project description posted. I am a Mobile_App_Development expert and have plenty of experience of it. However, I'd like to discuss more detail with you now. I am free to work now.,.///;'; Kindly More

$555 USD in 10 days
(12 Reviews)
5.3
avinashjain09

Hello, I have read your requirement and have understood it well. I have some questions regarding the security features that you have mentioned, so what is the good time to have discussion with you. I have worked on thi More

$1000 USD in 30 days
(5 Reviews)
5.2
LianHung96

How are you? I had read your job description carefully. I believe that I can do this job well. Because I have followed skills and experiences to build your product. - Object C and Swift - Java and javascrip More

$555 USD in 10 days
(9 Reviews)
4.8
StrongDecs

Greetings, I propose fastest delivery over top software quality, I confirm 2 weeks long maximal delivery timeline Please message if you are interested over the proposal Thanks, Regards

$2000 USD in 7 days
(30 Reviews)
4.3
mula9211

Hi, I have lots of experience in the field. Please have a review of my profile. I offer my services for your project, i assure you of a high quality professional service. We can chat details. I will install asterisk se More

$1000 USD in 30 days
(0 Reviews)
0.0
LinkedGatesCo

Hi sir i have two experienced android developers in my company and can assign any of them dedicated for your project . Don't worry and we are ready to finish it for you .

$555 USD in 30 days
(0 Reviews)
0.0