Plexiform neurofibroma is a rare benign tumor of the peripheral tissue cells that develops in the perineurium that is often considered pathognomonic of neurofibromatosis type 1 (NF1 or von Recklinghausen disease). They occur most frequently in the craniomaxillofacial region, rarely on back and extremities. They are extremely vascular and there is 15-20% potential for malignant transformation. A 35-year-old married female presented with painless swelling in left lower back that began at around 8 years of age. The swelling gradually increased in size. The patient reported embarrassment over the disfigurement caused by the mass. Her medical history was unremarkable and none of the relatives was known to be affected. Surgical resection of the swelling with primary closure was done. Histopathology findings were consistent with neurofibromatosis. Hereby reporting a rare case of isolated plexiform neurofibroma of lower back which was surgically cured as a perusal of rare entity. We also try to emphasize on the need of sprightful clinical diagnosis with multidisciplinary approach in the management of these type of tumors. Finally, we insist on the need of a long term clinical and radiological follow-up of these patients to assess  post resection recurrence or malignant transformation.

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Steganography and Digital Watermarking are two methods of information concealment in which the context can be interpreted as keeping the information hidden or making it subtle. Steganography is a means of disguising an information so that only the person(s) who placed it are aware of its existence. Onthe other hand digitalwatermarking is the technique of inserting a symbol of some form into a media file to differentiate it from others. Security authenticationis intended to be permanent, and it is applied by a process that involves changes to the media file. Other parties may be able to see or hide digital watermarking in plain sight. In this paper we are going to review the steganography techniques. This paper will do a whole comparativestudy of different steganography techniques also.

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