Abstract: A method for crypting one or more data blocks comprising: providing a main table 100 comprising a circular array of K randomly distributed bits with a predetermined start point, generating a master key 504 based on a series expansion of a user key, generating a first set of tumblers 506 using the master key, wherein each element of the master key defines a unique bitwise rotation of the main table from the predetermined start point, performing an XOR operation on the first set of tumblers to form a mask of K bits 508; generating a block key 512 based on the mask; and crypting 514 the one or more data blocks with an XOR operation of the block key.

Abstract: A method for crypting one or more data blocks comprising: providing a main table 100 comprising a circular array of K randomly distributed bits with a predetermined start point, generating a master key 504 based on a series expansion of a user key, generating a first set of tumblers 506 using the master key, wherein each element of the master key defines a unique bitwise rotation of the main table from the predetermined start point, performing an XOR operation on the first set of tumblers to form a mask of K bits 508; generating a block key 512 based on the mask; and crypting 514 the one or more data blocks with an XOR operation of the block key.