German reunification assets. Facilitation of economic development through planning measures failed to close the disparity between East and West, not only in terms of the economic opportunity but also housing conditions and transport options. Tölle states that "the initial euphoria about having become one unified people again was increasingly replaced by a growing sense of difference between Easterners ("Ossis") and Westerners ("Wessis")". The fall of the Wall also instigated immediate cultural change. The first consequence was the closure in East Berlin of politically oriented cultural institutions. The fall of the Berlin Wall and the factors described above led to mass migration from
Meet-in-the-middle attack of several functions (or block ciphers) such that the forward mapping through the first functions is the same as the backward mapping (inverse image) through the last functions, quite literally "meeting" in the middle of the composed function. For example, although Double DES encrypts the data with two different 56-bit keys, Double DES can be broken with 2 encryption and decryption operations. The multidimensional MITM (MD-MITM) uses a combination of several simultaneous MITM attacks like described above, where the meeting happens in multiple positions in the composed function. Diffie and Hellman first proposed the meet-in-the-middle attack on a hypothetical expansion