Data security is very important aspects in different areas of communication. This paper deals with text data encryption as maximum of the data communication is basically depends on text data. In this framework first the text data is loaded in the framework. Then it is partitioned into different blocks. The data is encrypted by RC5 method and keys are generated according to the blocks. Then an addition join key is generated for joining the blocks. Finally the results are compared based on the histogram, key lengths, variations in keys and image conversion. The comparative study shows the effectiveness of our approach.