Abstract
Along with the increasing development of cryptography and computer science, It is appropriate that we try to prepare and improve the ability of cryptographic algorithms To counteract and prevent threats. Generally This algorithm encrypt the text with combined using key. The original message must be the same length of the key used. Actually in this study, a new method for improve OTP was successfully carried out. first, key will be generated using PRNG algorithm then bits of Plaintext will be separate each into 2 bits then rotating it key using matrix table, further key will be inserted into separated Plaintext and re-separate each it into 1 byte, hereinafter the new Plaintext will be XORed with a rotated key. To produce more advanced cipher.
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