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Version 1.5.1, 2006-01-08
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

* Implemented Montgomery exponentiation
* Implemented generalized Karatsuba multiplication and squaring
* Implemented Comba squaring for 4, 6, and 8 word inputs
* Added new Modular_Exponentiator and Power_Mod classes
* Removed FixedBase_Exp and FixedExponent_Exp
* Fixed a performance regression in get_allocator introduced in 1.5.0
* Engines can now offer S2K algorithms and block cipher padding methods
* Merged the remaining global 'algolist' code into Default_Engine
* The low-level MPI code is linked as C again
* Replaced BigInt's get_nibble with the more general get_substring
* Some documentation updates