Reporters Without Borders (RSF) - the media rights group - has published a guide to help cyber-dissidents publish politically challenging materia.

The book - Handbook for Bloggers and Cyber-Dissidents - is available in English, French, Chinese, Arabic and Persian, and can be downloaded from the rsf.org website.

"Bloggers are often the only real journalists in countries where the mainstream media is censored or under pressure. Only they provide independent news, at the risk of displeasing the government and sometimes courting arrest," said RSF in a statement.

As well as containing hints and tips, the handbook also tells activists how to preserve their anonymity. Which is nice. ®