Unlike the BSI's other information products, which generally reference information and measures from a manufacturer, when a BSI warning pursuant to Section 7 BSIG is published, the manufacturer has not established any measures or only insufficient or untimely measures of its own to remedy or mitigate the danger resulting from the product.

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Do you want to know about security information relating to the Windows, Linux and Mac OS X operating systems along with commonly used software and hardware? If so, we recommend the 'technical security warnings'. We use these to inform you rapidly and comprehensively about dangers arising from the internet. In addition to background information on vulnerabilities with corresponding recommended actions, this service also provides technically extensive information.

Various factors are taken into consideration when classifying a risk level. The basic principle is: 'The higher the risk level, the faster you should act'. Detailed information can be found here.

The 'Sicher • Informiert newsletter' provides an overview of the most important security news every fourteen days. What computer viruses are currently circulating? What vulnerabilities have been discovered? How can these be resolved? In addition to 'troublemakers' and 'security measures' we also provide information about, for example, attempted fraud by cyber criminals or actions related to IT.

PGP (Pretty Good Privacy) is a technical procedure for the digital signature of electronic documents, such as emails. The signature option is one way for users to check the authenticity of emails sent by Bürger-CERT. However, certain technical requirements need to be met for this check, such as a plug-in for your email program. The public PGP key for our newsletter can be found here.

S/MIME stands for 'Secure/Multi-Purpose Internet Mail Extensions' and is a specification for secure electronic messages in MIME format that work on all platforms.

You can find information on our S/MIME key here.

If you wish to receive the Bürger-CERT information to a different e-mail address in future, you must first contact the information services from your old e-mail address in order to unsubscribe. You can then re-register with your new e-mail address.

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'CERT' is an abbreviation for 'Computer Emergency Response Team'. The first CERT was founded in 1988 in the USA. CERT teams deal with IT security and issue warning notifications and security information. CERTS normally work for IT specialists. The Bürger-CERT provides access to these services to normal users in a manner comprehensible to non-experts.

Apart from the fees for your internet usage (e.g. connection fees), there are no costs.

If you are not able to enter the captcha when subscribing to Bürger-CERT, please send an email to the BSI Public Relations Team. Please state in the e-mail which service you wish to subscribe to and if the service should be sent signed (please state which signature) or unsigned.