Security risks of pre-IMS AKA access security solutions

IMS may be exposed to attack by different types of
attackers. First type are script kiddies, curious but
inexperienced crackers who lack the ability to write
sophisticated hacking programs on their own and who
have fun initiating simple attacks for published security
problems and their exploits. Unlike the script kiddies the
second type are well-educated attackers and their frauds
are driven towards financial goals. Third type also
possesses good knowledge and economical motivation but
their activities are not frauds but industrial espionage. IMS
operator employees are potentially dangerous attackers
since they have excellent knowledge of the system.
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