Abstract: A mechanism is provided which allows to de-duplicate encrypted data such that the de-duplication ratio for encrypted data is similar to the de-duplication ration of the corresponding un-encrypted data and the purpose of encryption is not obfuscated, i.e. only the originator of the data (the client) can decrypt—and hence read—the data. This is achieved by interwoven the de-duplication algorithm with the encryption algorithm in a way that the data are encrypted with a key that is generated from the unencrypted data. Afterwards, that key is itself encrypted with an encryption key being private to a particular client. Due to the fact that the private key is not effecting the encrypted data stream, it can still be de-duplicated efficiently.

Abstract: A display with inherent means for avoiding moiré patterns in displayed digitized images having a two-dimensional array of non-uniformly spaced display elements such as LEDs, LCD, or TFT. Pixels within the display are non-uniformly spaced such that a fundamental pattern or “frequency” is not established, thereby avoiding the possibility of display physical characteristics interfering with image features, avoiding apparent moiré patterns and other display artifacts. If the source data for the image is a standard data set which represents data samples at uniformly-spaced pixels, the method interpolates the pixel values for the non-uniformly spaced display elements of the new array.