# IM history encryption
Your Second Life IMs history is being stored at SpeedLight server. This allows you switching devices easily, but you may worry that some database stores your messages text.
You can conceal your IMs history completely by encrypting them.
### Encrypting your IMs
The IMs history encryption can be enabled in "Avatar settings":
What happens when you enter the IMs history password:
1. Your browser generates two keys: one to **encrypt** messages, and one to **decrypt**
2. The key to **encrypt** goes to the SpeedLight server
3. The key to **decrypt** stays on your PC
Now all your further messages will be encrypted on server but visible in your browser
### Accessing IMs from another device
If you open SpeedLight on another device, you won't see your messages' text because is is encrypted:
Click the link and enter your IMs history password to see IMs on this device.
### Turning off the IMs history encryption
You can disable the IM encryption at any time if you know the password. Just untick the "Encrypt" checkbox and confirm the decryption.
All your existing IMs will be decrypted back.
If you don't remember the password, you can turn the encryption off too. But the text contents of the IMs will be lost.
### Changing the IM history password
To change the IM history password, disable the encryption first. Then enable the encryption back and specify the new encryption password.
**IMPORTANT!**** Do not enter** your SL password in the hint field. This field serves as a reminder for you to remember the encryption key.
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