Search results for "DPA"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
18	Moshe Avital, Hadar Dagan, Itamar Levi, Osnat Keren, Alexander Fish	DPA-Secured Quasi-Adiabatic Logic (SQAL) for Low-Power Passive RFID Tags Employing S-Boxes.	IEEE Trans. Circuits Syst. I Regul. Pap.	2015	DBLP DOI BibTeX RDF
18	François Durvaux, François-Xavier Standaert, Nicolas Veyrat-Charvillon, Jean-Baptiste Mairy, Yves Deville	Efficient Selection of Time Samples for Higher-Order DPA with Projection Pursuits.	COSADE	2015	DBLP DOI BibTeX RDF
18	Michael Muehlberghuber, Thomas Korak, Philipp Dunst, Michael Hutter	Towards Evaluating DPA Countermeasures for Keccak K1012ECCAK on a Real ASIC.	COSADE	2015	DBLP DOI BibTeX RDF
18	Daisuke Fujimoto, Noriyuki Miura, Yu-ichi Hayashi, Naofumi Homma, Takafumi Aoki, Makoto Nagata	A DPA/DEMA/LEMA-resistant AES cryptographic processor with supply-current equalizer and micro EM probe sensor.	ASP-DAC	2015	DBLP DOI BibTeX RDF
18	Fleura Hajilou, Ehsan Mazidi, Shahab Ardalan	DPA Resistance Enhancement through a Self-healing PLL based Power Mask.	SECRYPT	2015	DBLP DOI BibTeX RDF
18	Vincent Grosso, François-Xavier Standaert	ASCA, SASCA and DPA with Enumeration: Which One Beats the Other and When?	ASIACRYPT (2)	2015	DBLP DOI BibTeX RDF
18	Ashish Jain, Narendra S. Chaudhari	Evolving Highly Nonlinear Balanced Boolean Functions with Improved Resistance to DPA Attacks.	NSS	2015	DBLP DOI BibTeX RDF
18	Shengshuo Lu, Zhengya Zhang, Marios C. Papaefthymiou	1.32GHz high-throughput charge-recovery AES core with resistance to DPA attacks.	VLSIC	2015	DBLP DOI BibTeX RDF
18	Baris Ege, Kostas Papagiannopoulos, Lejla Batina, Stjepan Picek	Improving DPA resistance of S-boxes: How far can we go?	ISCAS	2015	DBLP DOI BibTeX RDF
18	Erica Tena-Sánchez, Antonio J. Acosta 0001	DPA vulnerability analysis on Trivium stream cipher using an optimized power model.	ISCAS	2015	DBLP DOI BibTeX RDF
18	Zdenek Martinasek, Ondrej Zapletal, Kamil Vrba, Krisztina Trasy	Power analysis attack based on the MLP in DPA Contest v4.	TSP	2015	DBLP DOI BibTeX RDF
18	Xiao Pang, Jing Wang, Chenxu Wang, Xinsheng Wang	A DPA resistant dual rail Préchargé logic cell.	ASICON	2015	DBLP DOI BibTeX RDF
18	Abhishek Chakraborty 0001, Bodhisatwa Mazumdar, Debdeep Mukhopadhyay	A practical DPA on Grain v1 using LS-SVM.	HOST	2015	DBLP DOI BibTeX RDF
18	Nail Etkin Can Akkaya, Burak Erbagci, Raymond Carley, Ken Mai	A DPA-resistant self-timed three-phase dual-rail pre-charge logic family.	HOST	2015	DBLP DOI BibTeX RDF
18	Muhammad Yasin, Bodhisatwa Mazumdar, Sk Subidh Ali, Ozgur Sinanoglu	Security analysis of logic encryption against the most effective side-channel attack: DPA.	DFTS	2015	DBLP DOI BibTeX RDF
18	Carolyn Whitnall, Elisabeth Oswald	Robust Profiling for DPA-Style Attacks.	CHES	2015	DBLP DOI BibTeX RDF
18	Josep Balasch, Benedikt Gierlichs, Oscar Reparaz, Ingrid Verbauwhede	DPA, Bitslicing and Masking at 1 GHz.	CHES	2015	DBLP DOI BibTeX RDF
18	Weijia Wang 0003, Yu Yu 0001, Junrong Liu, Zheng Guo 0001, François-Xavier Standaert, Dawu Gu, Sen Xu, Rong Fu	Evaluation and Improvement of Generic-Emulating DPA Attacks.	CHES	2015	DBLP DOI BibTeX RDF
18	Miao Yuan, Guoqiang Bai 0001	Improving Second-Order DPA Attacks with New Modeled Power Leakages.	CIS	2015	DBLP DOI BibTeX RDF
18	Chenyang Tu, Jian Zhou, Neng Gao, Zeyi Liu, Yuan Ma, Zongbin Liu	QRL: A High Performance Quadruple-Rail Logic for Resisting DPA on FPGA Implementations.	ICICS	2015	DBLP DOI BibTeX RDF
18	Christophe Clavier, Jean-Luc Danger, Guillaume Duc, M. Abdelaziz Elaabid, Benoît Gérard, Sylvain Guilley, Annelie Heuser, Michael Kasper, Yang Li 0001, Victor Lomné, Daisuke Nakatsu, Kazuo Ohta, Kazuo Sakiyama, Laurent Sauvage, Werner Schindler, Marc Stöttinger, Nicolas Veyrat-Charvillon, Matthieu Walle, Antoine Wurcker	Practical improvements of side-channel attacks on AES: feedback from the 2nd DPA contest.	J. Cryptogr. Eng.	2014	DBLP DOI BibTeX RDF
18	Sébastien Tiran, Sébastien Ordas, Yannick Teglia, Michel Agoyan, Philippe Maurine	A model of the leakage in the frequency domain and its application to CPA and DPA.	J. Cryptogr. Eng.	2014	DBLP DOI BibTeX RDF
18	Wei-Chih Lien, Sung-Ming Yen	A DPA Attack on the Implementation of RSA-CRT with Montgomery Reduction.	IEICE Trans. Fundam. Electron. Commun. Comput. Sci.	2014	DBLP DOI BibTeX RDF
18	Erica Tena-Sánchez, Javier Castro-Ramirez, Antonio J. Acosta 0001	A Methodology for Optimized Design of Secure Differential Logic Gates for DPA Resistant Circuits.	IEEE J. Emerg. Sel. Topics Circuits Syst.	2014	DBLP DOI BibTeX RDF
18	Yi Wang 0016, Yajun Ha	A Performance and Area Efficient ASIP for Higher-Order DPA-Resistant AES.	IEEE J. Emerg. Sel. Topics Circuits Syst.	2014	DBLP DOI BibTeX RDF
18	François Durvaux, François-Xavier Standaert, Nicolas Veyrat-Charvillon, Jean-Baptiste Mairy, Yves Deville	Efficient Selection of Time Samples for Higher-Order DPA with Projection Pursuits.	IACR Cryptol. ePrint Arch.	2014	DBLP BibTeX RDF
18	A. Adam Ding, Liwei Zhang, Yunsi Fei, Pei Luo	A Statistical Model for Higher Order DPA on Masked Devices.	IACR Cryptol. ePrint Arch.	2014	DBLP BibTeX RDF
18	Chang Liu 0001, Rajiv Ranjan 0001, Chi Yang, Xuyun Zhang, Lizhe Wang 0001, Jinjun Chen	MuR-DPA: Top-down Levelled Multi-replica Merkle Hash Tree Based Secure Public Auditing for Dynamic Big Data Storage on Cloud.	IACR Cryptol. ePrint Arch.	2014	DBLP BibTeX RDF
18	Amir Moradi 0001, François-Xavier Standaert	Moments-Correlating DPA.	IACR Cryptol. ePrint Arch.	2014	DBLP BibTeX RDF
18	Noboru Kunihiro, Junya Honda	RSA meets DPA: Recovering RSA Secret Keys from Noisy Analog Data.	IACR Cryptol. ePrint Arch.	2014	DBLP BibTeX RDF
18	Ravikumar Selvam, Dillibabu Shanmugam, Suganya Annadurai	Side Channel Attacks: Vulnerability Analysis of PRINCE and RECTANGLE using DPA.	IACR Cryptol. ePrint Arch.	2014	DBLP BibTeX RDF
18	Massimo Alioto, Simone Bongiovanni, Milena Djukanovic, Giuseppe Scotti, Alessandro Trifiletti	Effectiveness of Leakage Power Analysis Attacks on DPA-Resistant Logic Styles Under Process Variations.	IEEE Trans. Circuits Syst. I Regul. Pap.	2014	DBLP DOI BibTeX RDF
18	Daniel Vidal, Mario Lúcio Côrtes	Fast and accurate solution for power estimation and DPA countermeasure design.	PATMOS	2014	DBLP DOI BibTeX RDF
18	Stjepan Picek, Lejla Batina, Domagoj Jakobovic	Evolving DPA-Resistant Boolean Functions.	PPSN	2014	DBLP DOI BibTeX RDF
18	Jungmin Park, Akhilesh Tyagi	Towards Making Private Circuits Practical: DPA Resistant Private Circuits.	ISVLSI	2014	DBLP DOI BibTeX RDF
18	Oscar Reparaz, Benedikt Gierlichs, Ingrid Verbauwhede	Generic DPA Attacks: Curse or Blessing?	COSADE	2014	DBLP DOI BibTeX RDF
18	Erica Tena-Sánchez, Javier Castro-Ramirez, Antonio J. Acosta 0001	Low-Power Differential Logic Gates for DPA Resistant Circuits.	DSD	2014	DBLP DOI BibTeX RDF
18	Jie Guo 0002, Zhijie Chen, Danghui Wang, Zili Shao, Yiran Chen 0001	DPA: A data pattern aware error prevention technique for NAND flash lifetime extension.	ASP-DAC	2014	DBLP DOI BibTeX RDF
18	Shivam Bhasin, Nicolas Bruneau, Jean-Luc Danger, Sylvain Guilley, Zakaria Najm	Analysis and Improvements of the DPA Contest v4 Implementation.	SPACE	2014	DBLP DOI BibTeX RDF
18	Luciano Loder, Adão Antônio de Souza Jr., Marcelo Schiavon Fay, Rafael Soares	Towards a Framework to Perform DPA Attack on GALS Pipeline Architectures.	SBCCI	2014	DBLP DOI BibTeX RDF
18	Muhammet Ali Evci, Selçuk Kavut	DPA Resilience of Rotation-Symmetric S-boxes.	IWSEC	2014	DBLP DOI BibTeX RDF
18	Stjepan Picek, Kostas Papagiannopoulos, Baris Ege, Lejla Batina, Domagoj Jakobovic	Confused by Confusion: Systematic Evaluation of DPA Resistance of Various S-boxes.	INDOCRYPT	2014	DBLP DOI BibTeX RDF
18	Mehrdad Khatir, Leyla Nazhandali	Sense Amplifier Pass Transistor Logic for energy efficient and DPA-resistant AES circuit.	ISQED	2014	DBLP DOI BibTeX RDF
18	Carolyn Whitnall, Elisabeth Oswald, François-Xavier Standaert	The Myth of Generic DPA...and the Magic of Learning.	CT-RSA	2014	DBLP DOI BibTeX RDF
18	Suvadeep Hajra, Chester Rebeiro, Shivam Bhasin, Gaurav Bajaj, Sahil Sharma, Sylvain Guilley, Debdeep Mukhopadhyay	DRECON: DPA Resistant Encryption by Construction.	AFRICACRYPT	2014	DBLP DOI BibTeX RDF
18	A. Adam Ding, Liwei Zhang, Yunsi Fei, Pei Luo	A Statistical Model for Higher Order DPA on Masked Devices.	CHES	2014	DBLP DOI BibTeX RDF
18	Noboru Kunihiro, Junya Honda	RSA Meets DPA: Recovering RSA Secret Keys from Noisy Analog Data.	CHES	2014	DBLP DOI BibTeX RDF
18	Monjur Alam, Santosh Ghosh, Dipanwita Roy Chowdhury, Indranil Sengupta 0001	First-order DPA Vulnerability of Rijndael: Security and Area-delay Optimization Trade-off.	Int. J. Netw. Secur.	2013	DBLP BibTeX RDF
18	John G. Scudder	Deprecation of BGP Path Attributes: DPA, ADVERTISER, and RCID_PATH / CLUSTER_ID.	RFC	2013	DBLP DOI BibTeX RDF
18	Bodhisatwa Mazumdar, Debdeep Mukhopadhyay, Indranil Sengupta 0001	Constrained Search for a Class of Good Bijective S-Boxes With Improved DPA Resistivity.	IEEE Trans. Inf. Forensics Secur.	2013	DBLP DOI BibTeX RDF
18	Suvadeep Hajra, Debdeep Mukhopadhyay	Pushing the Limit of Non-Profiling DPA using Multivariate Leakage Model.	IACR Cryptol. ePrint Arch.	2013	DBLP BibTeX RDF
18	Suvadeep Hajra, Debdeep Mukhopadhyay	SNR to Success Rate: Reaching the Limit of Non-Profiling DPA.	IACR Cryptol. ePrint Arch.	2013	DBLP BibTeX RDF
18	Sébastien Tiran, Sébastien Ordas, Yannick Teglia, Michel Agoyan, Philippe Maurine	A Frequency Leakage Model and its application to CPA and DPA.	IACR Cryptol. ePrint Arch.	2013	DBLP BibTeX RDF
18	Carolyn Whitnall, Elisabeth Oswald	Profiling DPA: Efficacy and efficiency trade-offs.	IACR Cryptol. ePrint Arch.	2013	DBLP BibTeX RDF
18	Suvadeep Hajra, Debdeep Mukhopadhyay	Multivariate Leakage Model for Improving Non-profiling DPA on Noisy Power Traces.	Inscrypt	2013	DBLP DOI BibTeX RDF
18	Partha De, Kunal Banerjee 0001, Chittaranjan A. Mandal, Debdeep Mukhopadhyay	Designing DPA Resistant Circuits Using BDD Architecture and Bottom Pre-charge Logic.	DSD	2013	DBLP DOI BibTeX RDF
18	Begül Bilgin, Joan Daemen, Ventzislav Nikov, Svetla Nikova, Vincent Rijmen, Gilles Van Assche	Efficient and First-Order DPA Resistant Implementations of Keccak.	CARDIS	2013	DBLP DOI BibTeX RDF
18	Susana Eiroa, Iluminada Baturone	FPGA implementation and DPA resistance analysis of a lightweight HMAC construction based on photon hash family.	FPL	2013	DBLP DOI BibTeX RDF
18	Jie-Wei Lai, Chi-Hsueh Wang, Kaipon Kao, Anson Lin, Yi-Hsien Cho, Lan-chou Cho, Meng-Hsiung Hung, Xin-Yu Shih, Che-Min Lin, Sheng-Hong Yan, Yuan-Hung Chung, Paul C. P. Liang, Guang-Kaai Dehng, Hung-Sung Li, George Chien, Robert Bogdan Staszewski	A 0.27mm2 13.5dBm 2.4GHz all-digital polar transmitter using 34%-efficiency Class-D DPA in 40nm CMOS.	ISSCC	2013	DBLP DOI BibTeX RDF
18	Câncio Monteiro, Yasuhiro Takahashi, Toshikazu Sekine	DPA resistance of charge-sharing symmetric adiabatic logic.	ISCAS	2013	DBLP DOI BibTeX RDF
18	Xiaoxin Cui, Rui Li, Wei Wei, Juan Gu, Xiaole Cui	AHardware implementation of DES with combined countermeasure against DPA.	ASICON	2013	DBLP DOI BibTeX RDF
18	Bodhisatwa Mazumdar, Debdeep Mukhopadhyay, Indranil Sengupta 0001	Design and implementation of rotation symmetric S-boxes with high nonlinearity and high DPA resilience.	HOST	2013	DBLP DOI BibTeX RDF
18	Alberto Fuentes Rodríguez, Luis Hernández Encinas, Agustín Martín Muñoz, Bernardo Alarcos Alcázar	A Toolbox for DPA Attacks to Smart Cards.	SOCO-CISIS-ICEUTE	2013	DBLP DOI BibTeX RDF
18	Ruicong Ma, Daheng Yue, Shaoqing Li, Jihua Chen	Research on the Relationship between the Effect of DPA and Differential Sample Frequency.	DASC	2013	DBLP DOI BibTeX RDF
18	Carolyn Whitnall, Elisabeth Oswald	Profiling DPA: Efficacy and Efficiency Trade-Offs.	CHES	2013	DBLP DOI BibTeX RDF
18	Simone Bongiovanni, Mauro Olivieri, Giuseppe Scotti, Alessandro Trifiletti	A flip-flop implementation for the DPA-resistant Delay-based Dual-rail Pre-charge Logic family.	MIXDES	2013	DBLP BibTeX RDF
18	Kazuyuki Tanimura, Nikil D. Dutt	HDRL: Homogeneous Dual-Rail Logic for DPA Attack Resistive Secure Circuit Design.	IEEE Embed. Syst. Lett.	2012	DBLP DOI BibTeX RDF
18	Marco Bucci, Luca Giancane, Raimondo Luzzi, Alessandro Trifiletti	A Flip-Flop for the DPA Resistant Three-Phase Dual-Rail Pre-Charge Logic Family.	IEEE Trans. Very Large Scale Integr. Syst.	2012	DBLP DOI BibTeX RDF
18	Andrey Bogdanov, Ilya Kizhvatov	Beyond the Limits of DPA: Combined Side-Channel Collision Attacks.	IEEE Trans. Computers	2012	DBLP DOI BibTeX RDF
18	Carolyn Whitnall, Elisabeth Oswald, François-Xavier Standaert	The myth of generic DPA...and the magic of learning.	IACR Cryptol. ePrint Arch.	2012	DBLP BibTeX RDF
18	Bodhisatwa Mazumdar, Debdeep Mukhopadhyay, Indranil Sengupta 0001	Constrained Search for a Class of Good S-Boxes with Improved DPA Resistivity.	IACR Cryptol. ePrint Arch.	2012	DBLP BibTeX RDF
18	Jen-Wei Lee, Ju-Hung Hsiao, Hsie-Chia Chang, Chen-Yi Lee	An Efficient DPA Countermeasure With Randomized Montgomery Operations for DF-ECC Processor.	IEEE Trans. Circuits Syst. II Express Briefs	2012	DBLP DOI BibTeX RDF
18	A. Amaar, I. Ashour, Mustafa Shiple	Efficient Implementation of AES Algorithm Immune to DPA Attack.	UKSim	2012	DBLP DOI BibTeX RDF
18	Ganesh Khedkar, Dhireesha Kudithipudi	RRAM Motifs for Mitigating Differential Power Analysis Attacks (DPA).	ISVLSI	2012	DBLP DOI BibTeX RDF
18	Hiroki Ito, Mitsuru Shiozaki, Anh-Tuan Hoang, Takeshi Fujino	Efficient DPA-Resistance Verification Method with Smaller Number of Power Traces on AES Cryptographic Circuit.	DSD	2012	DBLP DOI BibTeX RDF
18	Hugo Daniel Hernández, Jonathan Scott, Wilhelmus A. M. Van Noije	DPA insensitive voltage regulator for contact smart cards.	SBCCI	2012	DBLP DOI BibTeX RDF
18	Lakshmi Narasimhan Ramakrishnan, Manoj Chakkaravarthy, Antarpreet Singh Manchanda, Mike Borowczak, Ranga Vemuri	SDMLp: On the use of complementary Pass transistor Logic for design of DPA resistant circuits.	HOST	2012	DBLP DOI BibTeX RDF
18	Hsing-Ping Fu, Ju-Hung Hsiao, Po-Chun Liu, Hsie-Chia Chang, Chen-Yi Lee	A low cost DPA-resistant 8-bit AES core based on ring oscillators.	VLSI-DAT	2012	DBLP DOI BibTeX RDF
18	Yuichi Komano, Hideo Shimizu, Chiho Mihara	Another look on the relation between template attack and higher order DPA.	ISITA	2012	DBLP BibTeX RDF
18	Yunsi Fei, Qiasi Luo, A. Adam Ding	A Statistical Model for DPA with Novel Algorithmic Confusion Analysis.	CHES	2012	DBLP DOI BibTeX RDF
18	Oscar Reparaz, Benedikt Gierlichs, Ingrid Verbauwhede	Selecting Time Samples for Multivariate DPA Attacks.	CHES	2012	DBLP DOI BibTeX RDF
18		DPA.	Encyclopedia of Cryptography and Security (2nd Ed.)	2011	DBLP DOI BibTeX RDF
18	Yang Li 0001, Kazuo Sakiyama, Shin-ichi Kawamura, Kazuo Ohta	Power Analysis against a DPA-Resistant S-Box Implementation Based on the Fourier Transform.	IEICE Trans. Fundam. Electron. Commun. Comput. Sci.	2011	DBLP DOI BibTeX RDF
18	Meng Zhang, Niraj K. Jha	FinFET-Based Power Management for Improved DPA Resistance with Low Overhead.	ACM J. Emerg. Technol. Comput. Syst.	2011	DBLP DOI BibTeX RDF
18	Haleh Vahedi, Stefano Gregori, Radu Muresan	The effectiveness of a current flattening circuit as countermeasure against DPA attacks.	Microelectron. J.	2011	DBLP DOI BibTeX RDF
18	Ming Tang 0002, Xiaorong Wang, Zhenlong Qiu, Si Gao, Huanguo Zhang, Qianhong Wu	DPA Leakage Evaluation and Countermeasure Plug-in.	IACR Cryptol. ePrint Arch.	2011	DBLP BibTeX RDF
18	Andrew Moss, Elisabeth Oswald, Dan Page, Michael Tunstall	Automatic Insertion of DPA Countermeasures.	IACR Cryptol. ePrint Arch.	2011	DBLP BibTeX RDF
18	Bhushan K. Bonde, Dany J. V. Beste, Emma Laing, Andrzej M. Kierzek, Johnjoe McFadden	Differential Producibility Analysis (DPA) of Transcriptomic Data with Metabolic Networks: Deconstructing the Metabolic Response of M. tuberculosis.	PLoS Comput. Biol.	2011	DBLP DOI BibTeX RDF
18	Abhishek Rawat, Ram Narayan Yadav, S. C. Shrivastava	Beamwidth Prediction of DPA Smart Antenna Using Support Vector Machine.	IICAI	2011	DBLP BibTeX RDF
18	Po-Chun Liu, Ju-Hung Hsiao, Hsie-Chia Chang, Chen-Yi Lee	A 2.97 Gb/s DPA-resistant AES engine with self-generated random sequence.	ESSCIRC	2011	DBLP DOI BibTeX RDF
18	Milena Djukanovic, Luca Giancane, Giuseppe Scotti, Alessandro Trifiletti, Massimo Alioto	Leakage Power Analysis attacks: Effectiveness on DPA resistant logic styles under process variations.	ISCAS	2011	DBLP DOI BibTeX RDF
18	Masaya Yoshikawa, M. Sugiyama	Multi-rounds masking method against DPA attacks.	IRI	2011	DBLP DOI BibTeX RDF
18	Yuejun Zhang, Pengjun Wang, Lipeng Hao	Design of resistant DPA three-valued counter based on SABL.	ASICON	2011	DBLP DOI BibTeX RDF
18	Katsuhiko Iwai, Mitsuru Shiozaki, Anh-Tuan Hoang, Kenji Kojima, Takeshi Fujino	Implementation and verification of DPA-resistant cryptographic DES circuit using Domino-RSL.	HOST	2011	DBLP DOI BibTeX RDF
18	Amir Moradi 0001, Oliver Mischke, Christof Paar	Practical evaluation of DPA countermeasures on reconfigurable hardware.	HOST	2011	DBLP DOI BibTeX RDF
18	Dakshita Khurana, Aditya Gaurav	Ensuring tight computational security against higher-order DPA attacks.	PST	2011	DBLP DOI BibTeX RDF
18	Xiaoyi Duan, Ronglei Hu, Xiu Ying Li	Research and Implementation of DPA-resistant SMS4 Block Cipher.	CIS	2011	DBLP DOI BibTeX RDF
18	Masaya Yoshikawa, Y. Kojima	Efficient Random Number for the Masking Method against DPA Attacks.	ICSEng	2011	DBLP DOI BibTeX RDF	Cryptography, Information security, Side channel attacks, Differential power analysis, Tamper resistance
18	Alessandro Cevrero, Francesco Regazzoni 0001, Micheal Schwander, Stéphane Badel, Paolo Ienne, Yusuf Leblebici	Power-gated MOS current mode logic (PG-MCML): a power aware DPA-resistant standard cell library.	DAC	2011	DBLP DOI BibTeX RDF
18	Yoo-Jin Baek	Regular 2w-ary right-to-left exponentiation algorithm with very efficient DPA and FA countermeasures.	Int. J. Inf. Sec.	2010	DBLP DOI BibTeX RDF