JPEG XR is the most recent still image coding standard, and custom security features for this format are required for\nfast adoption of the standard. Format-compliant encryption schemes are important for many application scenarios\nbut need to be highly customised to a specific recent format like JPEG XR. This paper proposes, discusses, and\nevaluates a set of format-compliant encryption methods for the JPEG XR standard: coefficient scan order permutation,\nsign bit encryption, transform-based encryption, random level shift encryption, index-based VLC encryption, and encrypting\nentire frequency bands are considered. All algorithms are thoroughly evaluated by discussing possible compression\nimpact, by assessing visual security and cryptographic security, and by discussing applicability in real-world scenarios.\nMost techniques are found to be insecure and, in a cryptographic sense, have a limited range of applicability and\ncannot be applied to JPEG XR bitstreams in an efficient manner. Encrypting enti
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