Apparatus for enciphering transmitted data by interchanging signal elements of the transmitted data without overlapping or omitting any elements within the transmitted signal train

Claim 2

Apparatus for transposing signal elements within a signal train comprising first storage means having a plurality of storage positions each capable of storing a signal element; input means for sequentially supplying each element of said signal into each storage position at a predetermined uniform rate; a signal generator operating in synchronism with said input means for generating signals each occurring at said predetermined rate wherein the value of each signal changes in a random manner; second storage means having a plurality of storage positions each being associated with a storage position in said first storage means; means for altering the state of the storage position in said second storage means at said predetermined rate; means responsive to the randomly generated values of said signal generator output for selecting the position in said second storage means corresponding to the value of said signal generator output to alter the state of the storage position selected; read-out means; means coupled to said second storage means for transferring to said read-out means the element stored in the position of the first storage means associated with the position in the second storage means being altered thereby transposing the arrangement of said elements in a nonuniform fashion.

Claim 3

The apparatus of claim 1 wherein said second storage means includes means for altering the level of said signal generator output for each selected storage position of said second storage means already altered to prevent the occurrence of overlaps or omissions in the transposed output signal train.

Claim 4

The apparatus of claim 1 further comprising third storage means having storage positions equal in number to said first storage means; switch means for alternately coupling said first and third storage means to said input means whereby one of said first and third storage means is being sequentially filled with elements while elements are being read out of the remaining one of said first and third storage means in transposed fashion.

Claim 5

The apparatus of claim 1 further comprising switch means for alternately coupling said first and third storage means to said read out means.

Claim 6

The apparatus of claim 1 further comprising third storage means having a plurality of storage positions each capable of storing a signal element; said read-out means further comprising a first intermediate output line coupled in common to each storage position of said first storage means; a second intermediate output line coupled in common to each storage position of said second storage means; a final output line; switch means for alternately coupling the said first and second intermediate output lines to said final output line at periodic intervals equal to a predetermined number of element time intervals.

Claim 7

The apparatus of claim 5 further comprising reversing means coupled to said final output line and to said signal generator for selectively altering the polarity of certain ones of said transposed elements fed to said reversing means responsive to predetermined output values of said generator.

Claim 8

The apparatus of claim 5 further comprising means coupled to said final output line and to said signal generator for selectively altering the D.C. level of certain ones of said transposed elements responsive to predetermined output values of said generator.

Claim 9

Apparatus for transposing elements within a signal tRain comprising: first storage means having a plurality of storage positions; an input line for receiving said signal train; a plurality of switch means coupled to said input line for selectively loading elements into differing non-consecutive storage positions in said first storage means; second storage means having a plurality of storage positions; a signal generator for generating randomly altered signal values at predetermined uniform time intervals; means responsive to the output of said signal generator for storing binary pulses in that storage position of said second storage means associated with the signal value of said signal generator, said pulses being stored in synchronism with said predetermined uniform time intervals; plural gating means each coupled to selected positions of said second storage means and responsive to the instantaneous output value of said signal generator and to the state of selected positions of said second storage means for altering the state of the second storage means associated position if it has not been previously altered; said storage positions of said second storage means each being coupled to an associated switch and, upon being altered by said gating means, generating a signal to enable its associated switch to transfer the element present in said input line to the storage position in said first storage means associated with the enabled switch, output means for sequentially reading out the storage positions of said first storage means whereby the order of elements in said output means are transposed from their original order.

Claim 10

Apparatus for transposing elements within a signal tRain comprising: first storage means having a plurality of storage positions; an input line for receiving said signal train; a plurality of switch means coupled to said input line for selectively loading elements into differing non-consecutive storage positions in said first storage means; second storage means having a plurality of storage positions; a signal generator for generating randomly altered signal values at predetermined uniform time intervals; means responsive to the output of said signal generator for storing binary pulses in that storage position of said second storage means associated with the signal value of said signal generator, said pulses being stored in synchronism with said predetermined uniform time intervals; plural gating means each coupled to selected positions of said second storage means and responsive to the instantaneous output value of said signal generator and to the state of selected positions of said second storage means for altering the state of the second storage means associated position if it has not been previously altered; said storage positions of said second storage means each being coupled to an associated switch and, upon being altered by said gating means, generating a signal to enable its associated switch to transfer the element present in said input line to the storage position in said first storage means associated with the enabled switch, output means for sequentially reading out the storage positions of said first storage means whereby the order of elements in said output means are transposed from their original order.

Claim 11

The apparatus of claim 8 wherein selected ones of said plural gating means include input means responsive to the failure of an associated gating means to alter the state of its associated second storage means storage position to activate the gating means having said input means to examine the state of its associated second storage means storage position.

Claim 12

Apparatus for transposing the positions of elements within a signal train comprising a plurality of individual signal stores; an input for receiving said signal train; plural switch means each associated with one of said signal stores and adapted to be selectively coupled to said input line for transferring the element present in said input line to one of said signal stores; first and second multi-position register means; generator means for generating output signals at predetermined uniform time intervals wherein each signal has a randomly altered segment value; means for filling said first register means with a signal pulse; means coupled to said generator means for altering the states of selected positions of said second register means responsive to the instantaneous output value of said generator means; means coupled to said second register means for permitting alteration of positions in said second register means only if the signal state of the second register means storage position has not previously been altered; means coupled between said second register means and said first register means for selectively altering the state of storage positions in said first register means when associated positions in said second register means are altered; said plural switch means each having control inputs coupled to associate storage positions of said first register means for enabling their associated switches when the state of their associated first register means storage positions are altered; an output line; means for selectively coupling said plural switch means to said output line responsive to said second register means whereby the elements in said output line are transposed from the order in which they appear in the input line.

Claim 13

Apparatus for transposing the positions of elements within a signal train comprising a plurality of individual signal stores; an input for receiving said signal train; plural switch means each associated with one of said signal stores and adapted to be selectively coupled to said input line for transferring the element present in said input line to one of said signal stores; first and second multi-position register means; generator means for generating output signals at predetermined uniform time intervals wherein each signal has a randomly altered segment value; means for filling said first register means with a signal pulse; means coupled to said generator means for altering the states of selected positions of said second register means responsive to the instantaneous output value of said generator means; means coupled to said second register means for permitting alteration of positions in said second register means only if the signal state of the second register means storage position has not previously been altered; means coupled between said second register means and said first register means for selectively altering the state of storage positions in said first register means when associated positions in said second register means are altered; said plural switch means each having control inputs coupled to associate storage positions of said first register means for enabling their associated switches when the state of their associated first register means storage positions are altered; an output line; means for selectively coupling said plural switch means to said output line responsive to said second register means whereby the elements in said output line are transposed from the order in which they appear in the input line.

Claim 14

The apparatus of claim 10, wherein said stores are magnetic wire stores.

Claim 15

The apparatus of claim 10, wherein said stores are magnetic film stores.

Claim 16

The apparatus of claim 10, wherein said stores are magnetic core sTores.

Claim 17

The apparatus of claim 10, wherein said stores are capacitive information stores, employing storage of electrical charges on capacitive carriers.

Claim 18

The apparatus of claim 14, wherein said stores are scanning means having electron beam means for scanning said capacitive information stores.

Claim 19

The apparatus of claim 10, wherein said stores are piezoelectric information stores.

Claim 20

The apparatus of claim 10, wherein said stores are ultrasonic delay lines.