Anonymous ID: 050cdf Feb. 11, 2020, 3:14 p.m. No.8106129   🗄️.is 🔗kun   >>6158 >>6300 >>6364

>>8106053

>>8106012

 

The F9 algorithm, someone a few weeks ago posted about it.

 

III.KASUMI CIPHERKASUMI cipher is a minor modification to the original cipher MISTY-1. KASUMIisablock cipherused in UMTS, GSM and GPRS mobile communication systems. In UMTS, KASUMIis used in the confidentiality(f8) and integrity algorithms (f9) with names UEA1 and UIA1 respectively. In GSM,KASUMIis used in the A5/3 key stream generator and in GPRS in the GEA3 key stream generator.KASUMI was designed for3GPPto be used in UMTS security system by theSecurity Algorithms Group of Experts(SAGE), a part of the European standards bodyETSI. The original MISTY-1 algorithm was slightly modified for easier hardware implementation and to meet other requirements set for 3G mobile communications security.KASUMI is a block cipher with 128-bit key and 64-bit input and output. The core of KASUMI is an eight-roundFeistel network. The round functions in the main Feistel network are irreversible Feistel-like network transformations. In each round the round function uses a round key which consists of eight 16-bit sub keys derived from the original128-bit key using a fixed key schedule.Difference between MISTY-1 and KASUMI is the expansion of the key. The key schedule consists of cyclical network of nonlinear FI-functions in the case of MISTY-1, but is completely linear in KASUMI.

Anonymous ID: 050cdf Feb. 11, 2020, 3:25 p.m. No.8106288   🗄️.is 🔗kun   >>6300 >>6364

>>8106244

 

https://threadreaderapp.com/thread/1220778576401833984.html

 

https://twitter.com/software_autist/status/1220778576401833984?lang=en

 

@software_autist on twitter thread on the subject