Data encryptor/decryptor using variable in-place i/o

A computer implemented process for data encryption or data decryption using a computer, the computer including a central processing unit which accesses a random access memory that controls an input/output device, said process comprising the steps of:

• (a) reading an input dataset with a physical read determined by an input/output control variable;
• (b) adding a value of a keypointer to a starting offset value of an access code key to determine a current element of the access code key;
• (c) exclusive ORing the current element with a current value of a data STRING byte determined by a value of a STRING pointer and saving as a new data STRING byte value;
• (d) replacing the new data STRING byte value with a value of a current element of a matrix array pointed to by a matrix array pointer and saving as a replaced data STRING byte value;
• (e) subtracting an increment/decrement counter starting value from the replaced data STRING byte value to yield a result and saving the result as a current STRING byte;
• (f) reversing the current STRING byte and saving as a reversed current STRING byte;
• (g) repeating steps (a) through (f) until all data has been either encrypted or decrypted;
• wherein said process allowing for encryption of data prior to its transmission or for decryption of encrypted data.

A computer implemented process for data encryption or data decryption using a computer, the computer including a central processing unit which accesses a random access memory that controls an input/output device, said process comprising the steps of:

• (a) reading an input dataset with a physical read determined by an input/output control variable;
• (b) replacing a current data STRING byte pointed to by a STRING pointer with a value of a current element of a matrix array pointed to by a matrix array pointer and saving as a replaced data STRING byte;
• (c) adding a decrement/increment counter starting value to a value of the replaced data STRING byte to yield a result and saving the result as a new STRING byte;
• (d) exclusive ORing a value of a current element of an access code key with a current value of a data STRING byte determined by a value of the STRING pointer;
• (e) adding the value of a keypointer to the starting offset value of the access code key;
• (f) reversing the new STRING byte and saving as a reverse STRING byte;
• (g) repeating steps (a) through (f) until all data has been either encrypted or decrypted;
• wherein said process allowing for encryption of data prior to its transmission or for decryption of encrypted data.