Retarus Gmbh

Michael Grauvogl

Martin Hager

A method of detecting malicious electronic messages transmitted from at least one message sending device to at least one message receiving device includes: generating at least one signature for an electronic message; storing the generated signature in a data storage unit; determining whether the electronic message is malicious; if the electronic message is determined to be malicious, determining on the basis of the generated signature, whether electronic messages comparable to the determined malicious message were classified as non-malicious and transmitted to the message receiving device in the past; and if it is determined that electronic messages comparable to the determined malicious message were classified as non-malicious and transmitted to the message receiving device in the past, notifying the message receiving device about a potential threat. Also disclosed are a messaging server and a messaging system implementing the above described method.

Technique for detecting malicious electronic messages

The disclosure relates to a method of detecting suspicious electronic messages. The method is performed in a messaging server which is in communication with a plurality of message senders and a plurality of message receivers, and comprises the steps of: receiving electronic messages sent from the plurality of message senders to at least one message receiver; extracting from each received message at least one message sender feature and at least one message content feature; recording the extracted message sender features and message content features in a database; determining, on the basis of the message content features recorded in the database, whether a specific content feature that can be associated with a current message has already been recorded in the past; if the specific content feature has already been recorded in the past, determining, on the basis of the message sender features recorded in the database, a number of message senders that can be associated with the specific content feature; and classifying the current message as suspicious if the determined number of message senders that can be associated with the specific content feature exceeds a predetermined threshold value. Also disclosed is a messaging server implementing the above described method.

Technique for detecting suspicious electronic messages

The disclosure relates to a method of transmitting fax messages from at least one fax message sending device to at least one fax message receiving device. The method is implemented in a fax communication device driver. The method comprises the steps of receiving, from a fax server software module, fax data associated with a fax message to be transmitted from a fax message sending device to a fax message receiving device; deciding, on the basis of at least one predetermined routing rule, whether to route the fax data to the fax communication device or to the cloud provider; and based on a decision result, selectively transmitting the fax data to the fax communication device or to the cloud provider for transmission to the fax message receiving device.

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Munich, Germany

Michael Grauvogl