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1982

The Group Special Mobile is created.

1991

The first GSM network is activated in Finland

1993

A million people are using GSM.

2000

Biryukov, Shamir, Wagner: time memory tradeoff attack, requiring 2 seconds of known plaintext.

Biham, Dunkelman: 2^20.8 known plaintext bits required

2003

Barkan, Biham, Keller: attack on A5/2. Breaking A5/2 can also have an impact on A5/1, because they use the same key for encryption, once this key is known, it can be used to decrypt A5/1 encrypted messages. They also attack A5/1 with a cyphertext-only attack using a time memory tradeoff (which is essentially the exact same attack that we are doing) (did they actually generate the tables?)

2007

Universities of Bochum, Kiel create COPACOBANA, which can be used to break A5/1 without the need to compute tables and can be used to create the tables for a TMTO attack with the same principles Barkan et al. used 2003. (did they create tables?)

2008

THC reiterate the 2003 attack with 70 fast fpga boards. (they did create tables, those are not available)

2009

We reiterate the 2003 attack with GPUs and a distributed table generation and storage. All major parts of the decryption attack are implemented, although with proof of concept look and feel.

2010

The majority of tables have been generated by the end of 2009, but a new set of better optimized tables was started. Fortunately, they will be finished much faster. Due to the optimizations achieved, the goal shifts from distributed generation, storage and lookup to semi-distributed generation and single point storage and lookup.