KASUMI
KASUMI is a successor of the MISTY1 cipher which was supposed to be stronger than MISTY1 and has been adopted as the standard encryption algorithm for European mobile phones. In 2005, KASUMI was broken, and in 2010 a new paper was published detailing a practical attack on the cipher; see the article for more details.
In the paper "Block Ciphers and Stream Ciphers" by Alex Biryukov, it is noted that KASUMI, also termed A5/3, is a strengthened version of block cipher MISTY1 running in a Counter mode.
However, in 2010 Dunkelman, Keller, and Shamir showed that KASUMI is not as strong as MISTY1; the KASUMI attack will not work against MISTY1.
Read more about this topic: MISTY1