Steganography is the science and art of hiding secret messages in other messages so that the existence of those messages cannot be known. The letter sent does not attract attention with steganography, and the container media does not arouse suspicion. Steganography requires two properties, namely container media and secret messages. The LSB method (least significant bit)is the simplest and easiest steganography method to implement. An example of implementing this method is to use a digital image as a cover text. Each pixel in the image is 1 (one) to 3 (three) bytes in size. Pda bit arrangement in a byte ( 1 byte = 8 bits), there are the most significant bits ( MSB) and the least significant bits (LSB). For example, on 11010010 bytes, the first bit from the right is the MSB bit, and the last bit from the right is the LSB bit. The matching bit is replaced with the message bit is the LSB bit, because the modification only changes the byte value to one higher or one lower than the previous value

This research discusses the implementation of Playfair Cipher to encode text data. Playfair Cipher is one of the classic cryptographic algorithms that use symmetry keys. Originally invented by Sir Charles Wheatstone and Baron Lyon Playfair, the algorithm used a 5x5 keyboard to encrypt and decrypt. The process of encryption and decryption is done by grouping the letters in a bigram. By using a 5x5 keyboard, we can encrypt plaintext (original text data to be encrypted) and decrypt the ciphertext (encrypted text data) by grouping it by removing the letter J from plaintext. The keypad is generated randomly by the software so that each encoding process (encryption and decryption) can use different keys. The software is also used to prove the correctness of the encryption and decryption results of the Playfair Cipher with cube keyboards.  Cipher Playfair software is developed using the C++ language and is console-based in a Windows development environment.