The DOI matches its Crossref record; 36 of the 70 references it cites were found in a registry or an index.
Secure spread spectrum watermarking for multimedia
Abstract
This paper presents a secure (tamper-resistant) algorithm for watermarking images, and a methodology for digital watermarking that may be generalized to audio, video, and multimedia data. We advocate that a watermark should be constructed as an independent and identically distributed (i.i.d.) Gaussian random vector that is imperceptibly inserted in a spread-spectrum-like fashion into the perceptually most significant spectral components of the data. We argue that insertion of a watermark under this regime makes the watermark robust to signal processing operations (such as lossy compression, filtering, digital-analog and analog-digital conversion, requantization, etc.), and common geometric transformations (such as cropping, scaling, translation, and rotation) provided that the original image is available and that it can be successfully registered against the transformed watermarked image. In these cases, the watermark detector unambiguously identifies the owner. Further, the use of Gaussian noise, ensures strong resilience to multiple-document, or collusional, attacks. Experimental results are provided to support these claims, along with an exposition of pending open problems.
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
Citations
Cites
A method for obtaining digital signatures and public-key cryptosystems
Rivest, R. L., Shamir, A., & Adleman, L. (1983) · Communications of the ACM · doi:10.1145/357980.358017 · Cited by 13,012
Huber, P. J. (1981) · Wiley Series in Probability and Statistics · doi:10.1002/0471725250 · Cited by 7,066
Vector Quantization and Signal Compression
Gersho, A., & Gray, R. M. (1992) · Springer eBooks · doi:10.1007/978-1-4615-3626-0 · Cited by 7,055
Three-dimensional computer vision: a geometric viewpoint
(1994) · Choice Reviews Online · doi:10.5860/choice.32-0357 · Cited by 3,032
Theory of Spread-Spectrum Communications - A Tutorial
Pickholtz, R. L., Schilling, D. L., & Milstein, L. B. (1982) · IEEE Transactions on Communications · doi:10.1109/tcom.1982.1095533 · Cited by 1,376
van Schyndel, R. G., Tirkel, A. Z., & Osborne, C. F. (2002) · Proceedings - International Conference on Image Processing · doi:10.1109/icip.1994.413536 · Cited by 1,139
Jähne, B. (1993) · Springer eBooks · doi:10.1007/978-3-662-21817-4 · Cited by 1,139
Collusion-secure fingerprinting for digital data
Boneh, D., & Shaw, J. (1998) · IEEE Transactions on Information Theory · doi:10.1109/18.705568 · Cited by 980
Signal compression based on models of human perception
Jayant, N. S., Johnston, J. D., & Safranek, R. J. (1993) · Proceedings of the IEEE · doi:10.1109/5.241504 · Cited by 790
Spread-Spectrum Communications
Ellersick, F., Schilling, D. L., Cook, C. E., et al. (1983) · Encyclopedia of Wireless and Mobile Communications · doi:10.1081/e-ewmc2-120043935 · Cited by 679
Flagged first, then by citations
34 of the 70 references couldn’t be matched to a known paper.
Research works printed but not linked: 6
- kilian, 0, Resistance of watermarked documents to collusional attacks
- braudaway, 1996, Color correct digital watermarking of images
- adelson, 1990, Digital signal encoding and decoding apparatus
- schreiber, 1991, Receiver-compatible enhanced definition television system
- rhoads, 1995, Indentification/authentication coding method and apparatus
- turner, 1989, Digital data security system
Cited by
Sorted by citations
Items 4,401–4,500 of 5,299
Digital Watermarking: A Communications with Side Information Perspective
Lu, C.-S., & Liao, H.-Y. M. (2001) · Lecture notes in computer science · doi:10.1007/3-540-45453-5_123
Robustness and Efficiency of Non-linear Side-Informed Watermarking
Silvestre, G. C. M., Hurley, N., & Furon, T. (2002) · Lecture notes in computer science · doi:10.1007/3-540-36415-3_7
Watermark and data hiding evaluation: The development of a statistical analysis framework
Kim, H. C. (2006) · Purdue e-Pubs (Purdue University System)
A secure public-key image authentication plan
Qing, Y., & Ke-fei, C. (2005) · Wuhan University Journal of Natural Sciences · doi:10.1007/bf02828671
Preda, R. O., & Vizireanu, N. D. (2012) · InTech eBooks · doi:10.5772/37998
A fragile watermarking based on the triplet of wavelet coefficients
He, Q., & Suqin, H. (2005) · doi:10.1109/icosp.2004.1442239
Inter-frame Differential Energy Video Watermarking Algorithm Based on Compressed Domain
Wang, L., Yao, H., Liu, S., et al. (2004) · Lecture notes in computer science · doi:10.1007/978-3-540-30126-4_94
Safe Rois Of Color Images By Inductive Data Hiding
Lo-Varco, G., & Puech, W. (2005) · doi:10.5281/zenodo.38781
Blind Image Watermark Analysis Using Feature Fusion and Neural Network Classifier
Lu, W., Sun, W., & Lu, H. (2008) · Lecture notes in computer science · doi:10.1007/978-3-540-87734-9_27
Design and analysis of acoustic data transmission system for wireless multimedia data transmission
Ryu, H., & Bok, J. (2012) · International Conference on Advanced Communication Technology
Swanson, M. D., & Tewfik, A. H. (1999) · The IMA volumes in mathematics and its applications · doi:10.1007/978-1-4612-1524-0_7
Improvement and Comments on Image Watermarking Using Complementary Modulation
Agung, I. W. P., & Sweeney, P. (2001) · Lecture notes in computer science · doi:10.1007/3-540-45453-5_53
A Blind Robust Watermarking Scheme Based on ICA and Image Dividing Blocks
Cao, Y., & Gong, W. (2010) · Lecture notes in computer science · doi:10.1007/978-3-642-12304-7_49
Enhanced Secure Algorithm for Fingerprint RecognitionPreprint
Saleh, A. M. A.-M. (2014) · arXiv (Cornell University) · doi:10.48550/arxiv.1402.4936
Improved Method of Spread Spectrum Watermarking Techniques Using Pixel-Correlations
Liu, Z. (2005) · Lecture notes in computer science · doi:10.1007/11552451_162
Wavelet-Domain Image Watermarking Based on Statistical Metrics
Leung, E. K. H., & Zeng, B. (2001) · Lecture notes in computer science · doi:10.1007/3-540-45453-5_101
Enhancing image watermarking methods by second order statistics
Tzeng, J., Hwang, W.-L., & Chern, I. (2002) · Proceedings - International Conference on Image Processing · doi:10.1109/icip.2001.958543
2D Watermarking: Non Conventional Approaches
Seddik, H. (2012) · InTech eBooks · doi:10.5772/37116
Multi-band Wavelet Based Digital Watermarking Using Principal Component Analysis
Kang, X., Shi, Y. Q., Huang, J., et al. (2005) · Lecture notes in computer science · doi:10.1007/11551492_11
Improve robustness of image watermarking via adaptive receiving
Kang, X., Huang, J., & Shi, Y. Q. (2005) · Proceedings - International Conference on Image Processing · doi:10.1109/icip.2004.1421570
Adaptive Hiding Scheme Based on VQ-Indices Using Commutable Codewords
Chang, C., Lin, C., & Yeh, J.-B. (2005) · Lecture notes in computer science · doi:10.1007/11596981_84
A Neuro-C4.5 Paradigm for Audio Steganogram Detection Based on Asymmetric Cost of False Errors
Geetha, S., & Muthuramalingam, S. (2014) · International Conference on Engineering of Complex Computer Systems · doi:10.1109/iceccs.2014.56
A Content-Protection Scheme for Multi-Layered Reselling Structures
Yu, P.-L., Tsai, P.-L., & Lei, C. (2004) · Springer eBooks · doi:10.1007/1-4020-8143-x_22
A Fast Error Concealment Using a Data Hiding Technique and a Robust Error Resilience for Video
Kim, J. O. (2003) · The KIPS Transactions PartB · doi:10.3745/kipstb.2003.10b.2.143
Modular Digital Watermarking for Image Verification and Secure Data Storage in Web Applications
Ilchev, S., & Ilcheva, Z. (2015) · Serdica Journal of Computing · doi:10.55630/sjc.2014.8.309-326
Vertrauliche Kommunikation mit Steganographie
Federrath, H., & Wicke, G. (1997) · University of Regensburg Publication Server (University of Regensburg) · doi:10.5283/epub.7406
Security Scheme for Digital Watermarking
Xiao, J., Wang, Y., Li, D., et al. (2015) · International Conference on Materials Engineering and Information Technology Applications (MEITA) · doi:10.2991/meita-15.2015.62
Prevention of Copyright Issues of Media in Social Network
Gayathri, K. S., Thomas, T., & S, J. J. (2012)
Application of the Hartung-Girod data hiding algorithm for image watermarking
Belov, A. M., & Fedoseev, V. (2015) · Pattern Recognition and Image Analysis · doi:10.1134/s1054661815030037
Lim, C. S., Abeysekera, S. S., & Amarasinghe, S. K. (2002) · IEEE International Conference on Acoustics Speech and Signal Processing · doi:10.1109/icassp.2001.941195
A Digital Rights Management Approach for Gray-Level Images
Tu, S.-F., & Hsu, C.-S. (2005) · Lecture notes in computer science · doi:10.1007/11552499_5
A robust watermarking algorithm for visually recognizable pattern
Hernández, V., Nakano-Miyatake, M., & Perez-Meana, H. M. (2005) · International Conference on Communications
Codage multirésolution sans perte et insertion de données : une approche intégrée
Motsch, J., Dutheil, O., Olivier Déforges, A., et al. (2007) · HAL (Le Centre pour la Communication Scientifique Directe)
A RESISTING ALGORITHM FOR DIGITAL IMAGE STEGANOGRAPHY IN WAVELET FIELD
Hajazizi, V., & Zadeh, M. J. (2016) · Cumhuriyet Science Journal · doi:10.17776/csj.95984
Design an Aperiodic Stochastic Resonance Signal Processor for Digital Watermarking
Sun, S., Lei, B., Zheng, S., et al. (2008) · Lecture notes in computer science · doi:10.1007/978-3-540-92238-4_27
Wu, K. (2015) · MATEC Web of Conferences · doi:10.1051/matecconf/20152201012
RetractedColor-Identification System Using the Sandglass-Type Neural Networks
Ito, S., Yano, K., Mitsukura, Y., et al. (2003) · Lecture notes in computer science · doi:10.1007/978-3-540-45224-9_159
Secured Data Hiding Technique: Dual Watermarking
Mahajan, L. H., & Patil, S. A. (2014)
Digital watermarking of images towards content protection
Nasir, I. A. (2010) · Bradford Scholars (University of Bradford)
Introduction to Digital Image and Video Compression and Processing
Zeng, B. (2002) · Elsevier eBooks · doi:10.1016/b978-155860651-7/50093-0
Families of traceability codes based on the Chinese Remainder Theorem
Cotrina, J., Fernández, M., & Casademont, J. (2006) · IEEE Information Theory Workshop (ITW) · doi:10.1109/itw.2006.1633794
Digital Watermarking as Content Protection Scheme
Santoso, P. (2004) · Jurnal Akuntansi dan Keuangan (Institute of Research and Community Outreach Petra Christian University) · doi:10.9744/jte.4.1
The image retrieval based on transform domain
Fu, W.-B., Li, J., Huang, M., et al. (2015) · doi:10.2991/meic-15.2015.100
A Hybrid Digital Video Watermarking Method Based on DCT and DWT
Sarnel, H. (2012) · IBU Repository
A Statistical Approach for Ownership Identification of Digital Images
Hsu, C.-S., Tu, S.-F., & Hou, Y. (2006) · Lecture notes in computer science · doi:10.1007/11864349_61
Digital image watermarking using GenLOT
Taškovski, D., Bogdanova, S., & Bogdanov, M. (2003) · IEEE Mediterranean Electrotechnical Conference (MELECON) · doi:10.1109/melecon.2002.1014656
Embedding Large Watermarks In Images Using Discrete Fractional Cosine Transform.
Sharma, S. S., & Chandrasekaran, V. (2009) · IPCV
A Blind Watermarking Algorithm Based on ICA
Yong, S., Xiaoli, W., & Ma, X. (2010) · International Conference on Multimedia and Information Technology · doi:10.1109/mmit.2010.50
A remark on the interplay between image compression and watermark embedding techniques
Jellinek, B., & Uhl, A. (2002) · doi:10.1109/ispa.2001.938605
Composite usage of local magnitudes and invariant segmentation for speech signals watermarking
Pelekh, Y., Peleshko, D., Peleshko, M., et al. (2015) · doi:10.1109/cadsm.2015.7230824
Lim, C. S., Abeysekera, S. S., Srikanthan, T., et al. (2003) · IEEE International Symposium on Circuits and Systems proceedings · doi:10.1109/iscas.2002.1009952
Enhancing robustness of information hiding against interference of communication with turbo code
Yang, J., Lee, M. H., & Park, J. Y. (2003) · IEEE International Symposium on Circuits and Systems proceedings · doi:10.1109/iscas.2002.1009765
Robust and Semi-fragile Watermarking Techniques for Image Content Protection
Zhao, X. (2009) · Surrey Research Insight Open Access (The University of Surrey)
A comparative study on chaotic map approaches for transform domain watermarking algorithm
Jane, O., İlk, H. G., & Α, E. E. (2015) · International Conference on Telecommunications and Signal Processing (TSP) · doi:10.1109/tsp.2015.7296451
Embedding Color Watermarks Into Halftoning Images Using Minimum-Distance Binary Patterns
Freitas, P. G., Farias, M. C. Q., & Araújo, A. (2015) · SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI) · doi:10.1109/sibgrapi.2015.35
Kablosuz Çoklu Ortam Algılayıcı Ağlarında Damgalama İle Güvenli Veri Kümeleme
Α, E. E., & Özdemi̇r, S. (2014) · DergiPark (Istanbul University)
Adaptive spread spectrum video watermarking
Demirel, H., Sener, S., & Golmen, M. (2004) · IEEE Signal Processing and Communications Applications Conference (SIU) · doi:10.1109/siu.2004.1338316
A Location Map-Free Reversible Data Hiding Method Inserting Data to Image Edges
Ono, M., Fujiyoshi, M., & Kiya, H. (2008)
Moderate computational load watermarking system for digital images
Martínez, J. M., & Mora, M. L. (2003) · IEEE International Carnahan Conference on Security Technology (ICCST) · doi:10.1109/ccst.1999.797898
A near-lossless spread spectrum watermarking technique for remote sensing imagery
Melgani, F., & Benzid, R. (2005) · IEEE International Geoscience and Remote Sensing Symposium (IGARSS) · doi:10.1109/igarss.2005.1526529
Watermarking Using Multiresolution Wavelet Transform and Image Fusion
Kim, D., Jun, K.-S., & Lee, D. (2005) · The KIPS Transactions PartB · doi:10.3745/kipstb.2005.12b.7.729
Image Scrambling Method for Information Distribution Via Vector Quantization Codebook Processing
Nakayama, T., Takeuchi, K., Konda, M., et al. (2006) · Intelligent Automation & Soft Computing · doi:10.1080/10798587.2006.10642928
WDFB Digital Watermarking Method Based on Multiscale Geometrie Analysis
Shao, G. M., & Hu, Z. H. (2012) · Advanced engineering forum · doi:10.4028/www.scientific.net/aef.6-7.1145
Audio Watermarking Scheme Using IMFs and HHT for Forensic Applications
alZahir, S., & Islam, M. W. (2013) · International Journal of Digital Crime and Forensics · doi:10.4018/ijdcf.2013100104
The Survey on Applications of Information Hiding Technology in E-Commerce Security
Chai, Y., Zhu, S., & Han, W. Y. (2013) · Applied Mechanics and Materials · doi:10.4028/www.scientific.net/amm.433-435.1866
Data Hiding Driven by Perceptual Features
Carli, M., Campisi, P., & Neri, A. (2005) · IEEE Workshop on Multimedia Signal Processing (MMSP) · doi:10.1109/mmsp.2005.248670
Steganalysis using difference images and bit-plane splitting
Zhao, Y., Park, T. H., Jeong, B. G., et al. (2011) · International Symposium on Intelligent Signal Processing and Communications Systems (ISPACS) · doi:10.1109/ispacs.2011.6146062
An Adaptive Detection Algorithm for Blind Watermark Based on Generalized Gaussian Distribution
Li, Z. M., & Wang, T. Y. (2012) · Applied Mechanics and Materials · doi:10.4028/www.scientific.net/amm.263-266.2058
FFT Based Information Concealing Method for Video Copyright Protection
Choi, I.-M., & Hwang, S.-C. (2013) · 전기학회논문지 P · doi:10.5370/kieep.2013.62.4.204
Digital Watermark Based on W-SVD Method in Copyright Protection of E-Service
Li, X., & Min, H. (2012) · Physics Procedia · doi:10.1016/j.phpro.2012.03.152
A binary watermarking scheme using quantization levels of BTC-PF method
Maiti, C. K., & Dhara, B. C. (2012) · doi:10.1109/codis.2012.6422275
Image Classification using Wavelet Watermarking Representation
Pun, C. (2007) · International Conference on Machine Learning and Cybernetics · doi:10.1109/icmlc.2007.4370381
Robust Time-Frequency Watermarking Based on Improved S Transformation
Deng, M. H., Zeng, Q. S., & Li, Y. J. (2011) · Key engineering materials · doi:10.4028/www.scientific.net/kem.467-469.146
Robustness Evaluation of Spread-Spectrum Watermarking Against Collusion Attack
Sakai, Y., & Mimura, K. (2012) · Journal of the Physical Society of Japan · doi:10.1143/jpsj.81.035005
Race among error control codes in OFDM - role of modulation techniques
Praveenkumar, P., Thenmozhi, K., Ramya, R., et al. (2014) · doi:10.1109/iccsp.2014.6949836
New image-hiding scheme based on blending in DCT domain
Gui-cang, Z., & Yujin, Z. (2002) · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · doi:10.1117/12.477133
Scene-based fingerprinting method for traitor tracing
Mehta, S., Nallusamy, R., & Prabhakaran, B. (2014) · Multimedia Systems · doi:10.1007/s00530-014-0442-5
Praveenkumar, P., Vivekhandan, S., Phaneendra, V., et al. (2013) · International Conference on Computer Communication and Informatics (ICCCI) · doi:10.1109/iccci.2013.6466292
Multiple watermarking algorithm based on chaotic sequences
Ji, Z., Xiao, W., & Zhang, J. (2003) · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · doi:10.1117/12.453509
Novel angle quantization index modulation scheme for image watermarking
Zhu, N., Cai, N., Weng, S., et al. (2014) · IEEE International Conference on Consumer Electronics - China (ICCE-China) · doi:10.1109/icce-china.2014.7029873
The Safety Research for Face Recognition System Based on Image Feature and Digital Watermarking
Li, F., & Wang, Y. Y. (2012) · Applied Mechanics and Materials · doi:10.4028/www.scientific.net/amm.224.485
Fast DFRFT Robust Watermarking Algorithm Based on the Arnold Scrambling and OFDM Coding
Yang, W., Guo, J., & Li, E. (2013) · IEICE Transactions on Communications · doi:10.1587/transcom.e97.b.218
Linear transformation-based asymmetric watermarking scheme
Gui, G., Jiang, L., & He, C. (2006) · Journal of Electronic Imaging · doi:10.1117/1.2234516
A4SM: a framework for distributed digital video production
Nack, F., Steinmetz, A. A., Dittmann, J., et al. (1998) · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · doi:10.1117/12.321923
Using Vilenkin-Chrestenson Functions for Generating Watermarks with Given Properties.
Bahrushin, A., Kim, K., & Tsoy, R. (2006) · IPCV
Scalable collusion secure fingerprinting for multimedia
Zhang, J., Li, Q., Liao, H., et al. (2010) · doi:10.1109/bicta.2010.5645230
A DCT-Domain System for Digital Watermarking
Liang, Y., Gao, Y. X., & Qi, C. X. (2013) · Applied Mechanics and Materials · doi:10.4028/www.scientific.net/amm.321-324.2609
Protecting web images from attacks to prove the real owner
Al-Nu’aimi, A. A.-T. (2011) · doi:10.1145/1980822.1980831
An efficient watermark embedding technique
Abdelwahab, A., Saad, E., & Yassin, N. I. R. (2005) · doi:10.1109/nrsc.2005.194012
A robust image watermarking arithmetic with scaling compatible in DCT domain
Guo, Y., Pan, F., & Shen, J. (2010) · International Congress on Image and Signal Processing (CISP) · doi:10.1109/cisp.2010.5647079
Content-Based Web Watermarking
Mir, N. (2013) · International Journal of Knowledge Society Research · doi:10.4018/ijksr.2013070107
A watermarking energy estimating model in wavelet domain
Xiao, Y., Cheng, L. M., & Cheng, L. L. (2008) · International Conference on Anti-counterfeiting, Security, and Identification · doi:10.1109/iwasid.2008.4688353
Copyright protection of images using human visual masking on DCT-based watermarking
Rangsanseri, Y., & Thitimajshima, P. (2002) · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · doi:10.1117/12.458714
A Digital Image Watermarking Using A Bottom-up Attention Module
Cheoi, K. J. (2008) · The KIPS Transactions PartB · doi:10.3745/kipstb.2008.15-b.4.293
Blind Watermarking Algorithm for Color Images Based on Nearest Neighbor Interpolation
Zou, X. G. (2013) · Applied Mechanics and Materials · doi:10.4028/www.scientific.net/amm.333-335.1185
A proficient algorithm for reversible data hiding using histogram modification
Vignesh, H., Vijayanandh, T., & Shenbagavalli, A. (2014) · International Conference on Circuits, Power and Computing Technologies (ICCPCT) · doi:10.1109/iccpct.2014.7054965
A time-frequency watermarking algorithm based on S transformation domain
Minghui, D., Qing-shuang, Z., & Song, Y. (2010) · doi:10.1109/icicisys.2010.5658535
The Theoretical Limits of Watermark Spread Spectrum Sequence
Jiang, N., & Wang, J. (2014) · The Scientific World JOURNAL · doi:10.1155/2014/432740
A Spread Spectrum Watermarking Algorithm Based on Local Instruction Statistic
Feng, T., Xiang, G., Lu, M., et al. (2013) · International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP) · doi:10.1109/iih-msp.2013.142
Near Optimal Detection of DCT-Domain Watermarks using Alpha-Stable Models
Sun, Z., & Xu, G. (2006) · International Conference on Communications and Networking in China (ChinaCom) · doi:10.1109/chinacom.2006.344880
Metadata
- Authors
- Cox, I. J., Kilian, J., Leighton, F. T., & Shamoon, T.
- Affiliations
- NEC (Japan) (JP)
- Massachusetts Institute of Technology (US)
- ORCID
- Cox, I.J.
- Venue
- IEEE Transactions on Image Processing
- Published
- 1997-12
- Volume
- 6
- Issue
- 12
- Pages
- 1673-1687
- ISSN
- 1057-7149 (ISSN-L)
- 1941-0042
- OpenAlex
- W2116467012
- Semantic Scholar
- a5eaa0b77d774745409499be2a2f16c506156161
- Cited by
- 5,299
- References
- 70
- Citations by year
- 2026: 65 · 2025: 60 · 2024: 48 · 2023: 69 · 2022: 74 · 2021: 85 · 2020: 84 · 2019: 112 · 2018: 132 · 2017: 160 · 2016: 168 · 2015: 201 · 2014: 211 · 2013: 240 · 2012: 289
- FWCI
- 98.40
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- IEEE Transactions on Image Processing (publishedVersion)
- PubMed (publishedVersion)
- UCL Discovery (University College London) (submittedVersion)
- Topics
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Steganography and Watermarking Techniques
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Digital Media Forensic Detection
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Data Compression Techniques
- Keywords
- digital watermarking, spread spectrum watermarking, tamper resistance, Gaussian random vectors, image watermarking, watermark robustness, lossy compression, geometric transformations, image registration
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review