outsourced spatial databases
Authenticated indexing for outsourced spatial databases FREE-DOWNLOAD [PDF] Y Yang, S Papadopoulos, D Papadias… – The VLDB Journal, 2009 Abstract In spatial database outsourcing, a data owner delegates its data management tasks to a location-based ser- vice (LBS), which indexes the data with an authenticated data structure (ADS). The LBS receives queries (ranges, nea- rest neighbors) originating from […]
Visual Cryptography-5
A Watermarking Technique based on Visual Cryptography FREE-DOWNLOAD [PDF] B Surekha, DGN Swamy, DKS Rao… – Journal of Information …, 2009 . perceived as such, and have wider applications than visible watermarks [2]. In general an effective watermarking scheme . In his method a secret key is used as a seed to select random pixels within the . Stacking […]
Visual Cryptography-4
A Multiple Watermarking Technique for Images based on Visual Cryptography FREE-DOWNLOAD [PDF] B Surekha, GN Swamy… – International Journal of Computer …, 2010 In general an effective watermarking scheme should satisfy properties such as invisibility, robustness . This paper proposes a watermarking technique, to directly embed multiple binary watermarks into a . Stacking both these transparencies will permit visual recovery of […]