Geodesic
Selective encryption of Huffman compressed text
Review of the National Center for Digitization, Tome 13 (2008) no. 1 
Miodrag Živković. Selective encryption of Huffman compressed text. Review of the National Center for Digitization, Tome 13 (2008) no. 1. http://geodesic.mathdoc.fr/item/NCD_2008_13_1_a3/
@article{NCD_2008_13_1_a3,
     author = {Miodrag \v{Z}ivkovi\'c},
     title = {Selective encryption of {Huffman} compressed text},
     journal = {Review of the National Center for Digitization},
     pages = {22 - 26},
     year = {2008},
     volume = {13},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/NCD_2008_13_1_a3/}
}
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Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

The security of multimedia data in digital distribution networks is commonly provided by encryption, i.e., the mathematical process that transforms a plaintext message into unintelligible ciphertext. Selective encryption is a recent approach to reduce the computational requirements for huge volumes of multimedia data in distribution networks with different client device capabilities. We propose a method for selective encryption that can be applied to compressed data - for example to Huffman compressed text.