A Survey on Visual Secret Sharing Scheme

The formatting requirements for Visual cryptographic technique is used for secure communication, various secrets and multimedia information are transmitted over the internet and suitable techniques are required to prevent form the illegal usage of information. This paper provides the survey of various visual cryptographic schemes based on their performance. This paper focuses on various threshold schemes like N, (2, N),(3,N), (K,K) and (K,N). In order to improve the security issue over the communication channel meaningful shares are used. The visual cryptography for binary pictures is also discussed. Other performance measures such as pixel expansion, contrast, accuracy is discussed in this paper.