How to Hack/Access someone's Whatsapp Account ?

WhatsApp is an instant messaging app for smartphones that operates under a subscription business model. The proprietary, cross-platform app uses the Internet to send text messages, images, video, user location and audio media messages.

Whatsapp can not be hacked remotely. All you can do is get the messages of someone.

Method 1 : Whatsapp backups your messages every morning at 4 am automatically. These backup files can be find in android device's mobile directory.
Path for directory is generally as follows

DeviceStorage > Whatsapp >  Databases

Here you can see how these files look like.

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​you can decrypt the database of whatsapp backup. To decrpt this dababase you can use this procedure:

Visit this site to decrypt messages

https://www.recovermessages.com

This site only decrypt old whatsapp database files with crypt extension .crypt and .crypt8. whatsapp is using Crypt8 technology in new whatsapp.

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Select your crypt file and tick on I accept the t&c.

​I will post here if I find the decrypt method for Crypt8 technology.

Note : whatsapp backups message at 4 am everyday. So messages deleted before 4 am will never be backuped automatically. Backup can be done manually.

Method 2 : Whatsapp does not work on two phones simultaneously reason is MAC address. So if you can change MAC address of anyone's devices as yours than you will be able to get message of someone after verification. Changing MAC address is called MAC address snooping.

procedure for MAC snooping is given on this link

http://android.stackexchange.com

How to Access Someone Else's WhatsApp Account:

1. Uninstall WhatsApp from your phone or device. You'll install it again at the end of the method, but you'll need to configure it differently, and the easiest way to make sure you'll be able to do that correctly is to completely uninstall it now.
2. Obtain your target's phone. You'll need it for two different steps throughout the process, but this shouldn't take too long - you should be able to return it before your target starts to miss it.
3. Find your target's phone's Media Access Control (MAC) address. A MAC address is a unique identifier assigned to your phone or other device that essentially serves as its online identity. Find and write down your target's MAC address. It takes the form of six pairs of letters or numbers, separated by colons (01:23:45:67:89:ab).
4. On an Android, find this in Settings → About phone → Status → Wi-Fi MAC address.
5. Find your MAC address using the instructions above. Make sure to save it somewhere secure, as you'll want to change your device back to that address once you're done.
6. Change ("spoof") your phone's MAC address to that of your target. This will allow your phone to pass as your target's, letting you convince WhatsApp that you are your target when you log in.
7. On Android, install BusyBox and the Terminal Emulator (apps available for free on Google Play). In the terminal, type "ip link show" to see a list of interfaces. Identify the one that has your MAC address -- for this example, we'll use the eth0 interface. In the terminal emulator, enter "ip link set eth0 address XX:XX:XX:XX:XX:XX" and "ip link set eth0 broadcast XX:XX:XX:XX:XX:XX", where eth0 is the interface you identified and XX:XX:XX:XX:XX:XX is your target's MAC address. To check that you've successfully changed your MAC address, enter "ip link show eth0."
8. Install and configure WhatsApp on your phone. Enter your target's phone number to set up WhatsApp rather than your own. This will allow you to receive their messages and send messages from their account.
9. Get the confirmation code from your target's phone. This code will be sent to their phone number as part of the WhatsApp configuration process. Access their phone one last time to get that verification code. Enter it into WhatsApp on your phone when prompted, and you're all ready to go.