WhatsApp | Telegram | Signal - Security features and Issues - Tamil ( தமிழ்‪)‬ Cyber Security | Cyber crime | Ethical Hacking | Pen Testing | Privacy | Digital Forensics தமிழ்

Whatsapp

WhatsApp offers almost every feature you might need. You get support for group chats with up to 256 members. You can also broadcast messages to multiple contacts at the same time. It also supports voice and video calls, both for individuals and groups. However, for group video calls, you are restricted to 8 users at any time. Further, WhatsApp also offers a Status feature (also called WhatsApp stories) similar to Instagram stories.

Whatsapp also allows you to share all sorts of files and documents, but there are file size limits to adhere to. For photos, videos, and audio files, the limit is 16 MB. However, documents can be up to 100 MB. You can also share live location with your contacts and I am sure many users find this feature helpful.

And since WhatsApp is meant for general users, it offers seamless backup and restore functionality through cloud services like Google Drive and iCloud. And the best part is that cloud backup is completely free.

Telegram

Telegram app offers so many features that it’s incredible. Similar to WhatsApp, you get the basics such as chats, group chats, and channels. However, unlike WhatsApp’s 256 member limit, Telegram brings support for groups with up to 200,000 members. It also offers multiple group-specific features such as bots, polls, quizzes, hashtags, and a lot more which can make group experiences a lot more fun.

The app also offers a unique feature, self-destructing messages (like Snapchat) which is great if you’re sending messages that you don’t want to remain on the recipient’s device for eternity. The size limit for sharing files on Telegram is a whopping 1.5 GB. The app now has both voice and video call on Android and iOS devices, which is great because video call support was a big omission from the app.

Signal

Signal offers its users secure messaging, voice, and video calls and all communications are end-to-end encrypted. Further, you can create groups, however, you don’t have the option to broadcast messages to multiple contacts at once. Plus, Signal has recently added support for group calling as well.

It has a feature similar to the self-destructing messages of Telegram. The best feature of Signal is “Note to Self”. Unlike WhatsApp, you don’t have to create a single-member group to send notes to yourself. On Signal, the feature is available natively and you can jot down your thoughts and ideas while messaging with your friends and family.

Apart from that, Signal allows you to relay voice calls to its servers so your identity remains concealed from your contacts. The feature is somewhat similar to what a VPN does. There are also emojis and some privacy stickers, but they are very limited in comparison to WhatsApp and Telegram.

Security issues:

WhatsApp
Device ID
User ID
Advertising Data
Purchase History
Coarse Location
Phone Number
Email Address
Contacts
Product Interaction
Crash Data
Performance Data
Other Diagnostic Data
Payment Info
Customer Support
Product Interaction
Other User Content

Telegram
Contact Info
Contacts
User ID

Signal
None. (The only personal data Signal stores is your phone number)





-Dinesh Paranthagan

Hackup Technology