Badly coded ransomware locks away data forever

Coding mistakes in a malicious program that encrypts data mean anyone hit by the Power Worm virus will not be able to recover files, say security experts.

Usually viruses known as ransomware decrypt files when victims have paid a substantial fee.

But one variant of Power Worm destroys keys that could help recover any data that it scrambled.

The news comes as hackers produce ransomware that is aimed at websites and encrypts data sitting on servers.

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