Method for ensuring data transmission security, communication system and communication device

• Main Authors: NIEMI VALTTERI, NYBERG KAISA
• Format: Patent
• Language: English
• Published: 09.08.2011
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; JAMMING OF COMMUNICATION; SECRET COMMUNICATION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A method for ensuring data transmission security between a first and a second communication device in short-range wireless communication sets up a data transmission connection, wherein the communication devices conduct a key exchange stage to generate at least one shared key between the communication devices. After the key exchange stage at least a first and a second check string is formed, the strings being based at least on a unique short random string and on the keys generated in each communication device at the key exchange stage. Thus, the security of the connection that is set up is ensured by comparing the correspondence of the check strings. The invention also relates to a communication system and a communication device, in which the method is applied.