One of my friends asked me to do a favor for her. She said her friend deleted some important chat messages by “accident”, and her friend want to recover those deleted messages as soon as possible… I took a look at this android phone. My God, lots of…

Last month Candy was arrested on suspicion of having doing online porn webcam shows, but Candy refused to confess to her crime. The Police extracted data from her iPhone and found lots of chat messages in Skype’s database – main.db. Unfortunately the…

Let me show you the WeChat version first. It is 6.3. What will happen to WeChat deleted chat messages? Take a look at "Blocks containing deleted data" and those deleted messages were wiped. What about WhatsApp? The version is 2.12.317. Fortunate…

As we know that WeChat will wipe deleted chat messages. That's why forensic guys could  not dig out any deleted chat messages in EnMicroMsg.db. Is it possible to let those deleted chat messages show up again? For performance's sake, WeChat will creat…

The evidence is iPhone 5s with iOS 9.1 and not jail breaked. I use UFED to do advanced logical extraction just now. All I know is that suspect did use Naver LINE a lot. Unfortunately I did not recover any deleted LINE chat messages after advanced log…

Forensic is a strict science and we should let the evidence speak for itself. Several months ago I still could recovered Line deleted chat messages as below:…

A friend of mine she was frustarted in extracting WeChat chat messages from suspect's smartphone running Android 7.x. The situation is that no pattern lock/PIN/Password and USB debugging was enabled successfully. She tried every effort but in vain. N…

This article is from an interview with Zuhaib Siddique, a production engineer at HipChat, makers of group chat and IM for teams. HipChat started in an unusual space, one you might not think would have much promise, enterprise group messaging, but as…

Facebook Chat, offered a nice set of software engineering challenges: Real-time presence notification: The most resource-intensive operation performed in a chat system is not sending messages. It is rather keeping each online user aware of the online…

It's reported that FB Messenge is the most secure App for instant messaging service. Let's see if FB messenger is secure enough or not. I'll evaluate it according to OWASP Mobile Top 10 risks. The first one of OWASP Moble Top ten risks is M1- "Insecu…