Many application scenarios do not demand confidential encryption of visual data, but on the contrary require that certain image information is public (transparent encryption). One scenario is e.g., PayTV, where a low quality version should become public to attract possible customers. Transparent encryption can be implemented most efficiently in case of scalable bitstreams by encrypting enhancem...

Predicate encryption has an advantage over traditional publickey or identity-based encryption, since predicate encryption systems provide more flexible control over access to encrypted data. We focus on delegation capabilities in predicate systems. More specifically, we investigate delegatable encryption systems supporting disjunctive predicate evaluations. We present formal security definition...

This paper presents our industrial experience on the implementation of SpeedyDes3 encryption which is a speed up version of the Des3 encryption. This SpeedyDes3 encryption improves the standard Des3 encryption by means of speed and memory usage. Our SpeedyDes3 encryption is particular suitable for use/running in small systems. We have applied the SpeedyDes3 for the encryption of data in video p...