When the NSA's invincible code-breaking machine - encounters a mysterious code it cannot break, the agency calls in its head cryptographer, Susan Fletcher, a brilliant and beautiful mathematician. What she uncovers sends shock waves through the corridors of power. The NSA is being held hostage...not by guns or bombs, but by a code so ingeniously complex that if released it will cripple U.S. intelligence.

I just had to buy it.
It's my area. Algorithms, cryptology, computers.

Fantastic book. Just love it!
The data encryption! The mistery envolving data, algorithms, tracer software, ... amazing!
It trapped me into the story right from the begining!
This an fiction book. Somethings doesn't correspond to reality, but, the book worth it. Afterwards, it is all because love.

Some little advice to the writer: the Portuguese doesn't have names like Huluhot. They are Silva, Sousa, etc... not Hulohot. ;-)