A tachograph which belongs to the group of ORD devices is the oldest recorder (On Board Recording Devices), and the duty of taking it was led into the USA already in 1939. In order to solve all these problems, they led with Directive of Advice No. 2135/98 from 24 September 1998 of the August of 2004 from the beginning of in the area of the European Union, new type of registering setting up in the road transport - digital tachograph. In order to make it impossible to abuse, a complex system of keys was applied cryptological and of certificates, saved in grating and devices, letting for explicit determining entitlements of users and authenticities of data, cards and devices. In spite of using the most modern keys and securing systems, with respect to elements of the system of digital tachographs a lot of modus operandis were observed so that they registered wrong sizes. The European Union took right action in order to prevent, nevertheless they must be implemented into the everyday life. This paper includes information about level of manipulation of digital tachograph and their elements, ways of manipulation of digital tachograph and future ways of counteracting manipulations.