{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T17:58:41Z","timestamp":1785952721988,"version":"3.56.0"},"publisher-location":"Berlin, Heidelberg","reference-count":45,"publisher":"Springer Berlin Heidelberg","isbn-type":[{"value":"9783642239502","type":"print"},{"value":"9783642239519","type":"electronic"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011]]},"DOI":"10.1007\/978-3-642-23951-9_22","type":"book-chapter","created":{"date-parts":[[2011,9,26]],"date-time":"2011-09-26T01:17:11Z","timestamp":1316999831000},"page":"326-341","source":"Crossref","is-referenced-by-count":512,"title":["The LED Block Cipher"],"prefix":"10.1007","author":[{"given":"Jian","family":"Guo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Peyrin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Axel","family":"Poschmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matt","family":"Robshaw","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","reference":[{"key":"22_CR1","doi-asserted-by":"crossref","unstructured":"Abdelraheem, M., Blondeau, C., Naya-Plasencia, M., Videau, M., Zenner, E.: Cryptanalysis of Armadillo-2, http:\/\/eprint.iacr.org\/2011\/160.pdf","DOI":"10.1007\/978-3-642-25385-0_17"},{"key":"22_CR2","doi-asserted-by":"crossref","unstructured":"\u00c5gren, M.: Some Instant- and Practical-Time Related-Key Attacks on KTANTAN32\/48\/64, http:\/\/eprint.iacr.org\/2011\/140","DOI":"10.1007\/978-3-642-28496-0_13"},{"key":"22_CR3","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1007\/978-3-642-03317-9_1","volume-title":"Fast Software Encryption","author":"J.-P. Aumasson","year":"2009","unstructured":"Aumasson, J.-P., Dinur, I., Meier, W., Shamir, A.: Cube Testers and Key Recovery Attacks on Reduced-Round MD6 and Trivium. In: Dunkelman, O. (ed.) FSE 2009. LNCS, vol.\u00a05665, pp. 1\u201322. Springer, Heidelberg (2009)"},{"key":"22_CR4","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1007\/978-3-642-15031-9_1","volume-title":"Cryptographic Hardware and Embedded Systems, CHES 2010","author":"J.-P. Aumasson","year":"2010","unstructured":"Aumasson, J.-P., Henzen, L., Meier, W., Naya-Plasencia, M.: Quark: A Lightweight Hash. In: Mangard, S., Standaert, F.-X. (eds.) CHES 2010. LNCS, vol.\u00a06225, pp. 1\u201315. Springer, Heidelberg (2010)"},{"key":"22_CR5","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"398","DOI":"10.1007\/978-3-642-15031-9_27","volume-title":"Cryptographic Hardware and Embedded Systems, CHES 2010","author":"S. Badel","year":"2010","unstructured":"Badel, S., Dagtekin, N., Nakahara, J., Ouafi, K., Reff\u00e9, N., Sepehrdad, P., Susil, P., Vaudenay, S.: ARMADILLO: A Multi-purpose Cryptographic Primitive Dedicated to Hardware. In: Mangard, S., Standaert, F.-X. (eds.) CHES 2010. LNCS, vol.\u00a06225, pp. 398\u2013412. Springer, Heidelberg (2010)"},{"key":"22_CR6","unstructured":"Barreto, P., Rijmen, V.: The Whirlpool Hashing Function. Submitted to NESSIE (September 2000), http:\/\/www.larc.usp.br\/~pbarreto\/WhirlpoolPage.html (revised May 2003)"},{"key":"22_CR7","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"245","DOI":"10.1007\/3-540-48519-8_18","volume-title":"Fast Software Encryption","author":"A. Biryukov","year":"1999","unstructured":"Biryukov, A., Wagner, D.: Slide Attacks. In: Knudsen, L.R. (ed.) FSE 1999. LNCS, vol.\u00a01636, pp. 245\u2013259. Springer, Heidelberg (1999)"},{"key":"22_CR8","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"589","DOI":"10.1007\/3-540-45539-6_41","volume-title":"Advances in Cryptology - EUROCRYPT 2000","author":"A. Biryukov","year":"2000","unstructured":"Biryukov, A., Wagner, D.: Advanced Slide Attacks. In: Preneel, B. (ed.) EUROCRYPT 2000. LNCS, vol.\u00a01807, pp. 589\u2013606. Springer, Heidelberg (2000)"},{"key":"22_CR9","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1007\/978-3-642-10366-7_1","volume-title":"Advances in Cryptology \u2013 ASIACRYPT 2009","author":"A. Biryukov","year":"2009","unstructured":"Biryukov, A., Khovratovich, D.: Related-Key Cryptanalysis of the Full AES-192 and AES-256. In: Matsui, M. (ed.) ASIACRYPT 2009. LNCS, vol.\u00a05912, pp. 1\u201318. Springer, Heidelberg (2009)"},{"key":"22_CR10","doi-asserted-by":"crossref","unstructured":"Blondeau, C., Naya-Plasencia, M., Videau, M., Zenner, E.: Cryptanalysis of ARMADILLO2, http:\/\/eprint.iacr.org\/2011\/160","DOI":"10.1007\/978-3-642-34047-5_9"},{"key":"22_CR11","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"450","DOI":"10.1007\/978-3-540-74735-2_31","volume-title":"Cryptographic Hardware and Embedded Systems - CHES 2007","author":"A. Bogdanov","year":"2007","unstructured":"Bogdanov, A., Knudsen, L.R., Leander, G., Paar, C., Poschmann, A., Robshaw, M.J.B., Seurin, Y., Vikkelsoe, C.: PRESENT: An Ultra-Lightweight Block Cipher. In: Paillier, P., Verbauwhede, I. (eds.) CHES 2007. LNCS, vol.\u00a04727, pp. 450\u2013466. Springer, Heidelberg (2007)"},{"key":"22_CR12","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"252","DOI":"10.1007\/978-3-642-21702-9_15","volume-title":"Fast Software Encryption","author":"C. Boura","year":"2011","unstructured":"Boura, C., Canteaut, A., De Canni\u00e8re, C.: Higher-Order Differential Properties of Keccak and Luffa. In: Joux, A. (ed.) FSE 2011. LNCS, vol.\u00a06733, pp. 252\u2013269. Springer, Heidelberg (2011)"},{"key":"22_CR13","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"272","DOI":"10.1007\/978-3-642-04138-9_20","volume-title":"Cryptographic Hardware and Embedded Systems - CHES 2009","author":"C. Canni\u00e8re De","year":"2009","unstructured":"De Canni\u00e8re, C., Dunkelman, O., Kne\u017eevi\u0107, M.: KATAN and KTANTAN \u2014 A Family of Small and Efficient Hardware-Oriented Block Ciphers. In: Clavier, C., Gaj, K. (eds.) CHES 2009. LNCS, vol.\u00a05747, pp. 272\u2013288. Springer, Heidelberg (2009)"},{"key":"22_CR14","doi-asserted-by":"crossref","unstructured":"De Canni\u00e8re, C., Preneel, B.: Trivium. In: Robshaw and Billet [43], pp. 244\u2013266","DOI":"10.1007\/978-3-540-68351-3_18"},{"key":"22_CR15","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"191","DOI":"10.1007\/978-3-642-21040-2_13","volume-title":"Information Security Theory and Practice. Security and Privacy of Mobile Devices in Wireless Communication","author":"J. Choy","year":"2011","unstructured":"Choy, J., Zhang, A., Khoo, K., Henricksen, M., Poschmann, A.: AES variants secure against related-key differential and boomerang attacks. In: Ardagna, C.A., Zhou, J. (eds.) WISTP 2011. LNCS, vol.\u00a06633, pp. 191\u2013207. Springer, Heidelberg (2011), http:\/\/eprint.iacr.org\/2011\/072"},{"key":"22_CR16","unstructured":"Daemen, J., Rijmen, V.: AES Proposal: Rijndael. NIST AES proposal (1998)"},{"key":"22_CR17","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"149","DOI":"10.1007\/BFb0052343","volume-title":"Fast Software Encryption","author":"J. Daemen","year":"1997","unstructured":"Daemen, J., Knudsen, L.R., Rijmen, V.: The Block Cipher SQUARE. In: Biham, E. (ed.) FSE 1997. LNCS, vol.\u00a01267, pp. 149\u2013165. Springer, Heidelberg (1997)"},{"key":"22_CR18","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"crossref","first-page":"393","DOI":"10.1007\/978-3-642-14623-7_21","volume-title":"Advances in Cryptology \u2013 CRYPTO 2010","author":"O. Dunkelman","year":"2010","unstructured":"Dunkelman, O., Keller, N., Shamir, A.: A Practical-Time Related-Key Attack on the KASUMI Cryptosystem Used in GSM and 3G Telephony. In: Rabin, T. (ed.) CRYPTO 2010. LNCS, vol.\u00a06223, pp. 393\u2013410. Springer, Heidelberg (2010)"},{"key":"22_CR19","unstructured":"Engels, D., Fan, X., Gong, G., Hu, H., Smith, E.M.: Ultra-Lightweight Cryptography for Low-Cost RFID Tags: Hummingbird Algorithm and Protocol, http:\/\/www.cacr.math.uwaterloo.ca\/techreports\/2009\/cacr2009-29.pdf"},{"key":"22_CR20","doi-asserted-by":"crossref","unstructured":"Engels, D., Saarinen, M.-J.O., Smith, E.M.: The Hummingbird-2 Lightweight Authenticated Encryption Algorithm, http:\/\/eprint.iacr.org\/2011\/126.pdf","DOI":"10.1007\/978-3-642-25286-0_2"},{"key":"22_CR21","doi-asserted-by":"crossref","unstructured":"Gilbert, H., Peyrin, T.: Super-Sbox Cryptanalysis: Improved Attacks for AES-Like Permutations. In: Hong and Iwata [27], pp. 365\u2013383","DOI":"10.1007\/978-3-642-13858-4_21"},{"key":"22_CR22","volume-title":"RFIDSec 2011","author":"Z. Gong","year":"2011","unstructured":"Gong, Z., Nikova, S., Law, Y.-W.: A New Family of Lightweight Block Ciphers. In: Juels, A., Paar, C. (eds.) RFIDSec 2011. Springer, Heidelberg (to appear, 2011), http:\/\/www.rfid-cusp.org\/rfidsec\/files\/RFIDSec2011DraftPapers.zip"},{"key":"22_CR23","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"222","DOI":"10.1007\/978-3-642-22792-9_13","volume-title":"Crypto 2011","author":"J. Guo","year":"2011","unstructured":"Guo, J., Peyrin, T., Poschmann, A.: The PHOTON Family of Lightweight Hash Functions. In: Rogaway, P. (ed.) CRYPTO 2011. LNCS, vol.\u00a06841, pp. 222\u2013239. Springer, Heidelberg (2011)"},{"key":"22_CR24","doi-asserted-by":"crossref","unstructured":"H\u00e4m\u00e4l\u00e4inen, P., Alho, T., H\u00e4nnik\u00e4inen, M., H\u00e4m\u00e4l\u00e4inen, T.D.: Design and Implementation of Low-Area and Low-Power AES Encryption Hardware Core. In: DSD, pp. 577\u2013583 (2006)","DOI":"10.1109\/DSD.2006.40"},{"key":"22_CR25","doi-asserted-by":"crossref","unstructured":"Hell, M., Johansson, T., Maximov, A., Meier, W.: The Grain Family of Stream Ciphers. In: Robshaw and Billet [43], pp. 179\u2013190","DOI":"10.1007\/978-3-540-68351-3_14"},{"key":"22_CR26","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"46","DOI":"10.1007\/11894063_4","volume-title":"Cryptographic Hardware and Embedded Systems - CHES 2006","author":"D. Hong","year":"2006","unstructured":"Hong, D., Sung, J., Hong, S., Lim, J., Lee, S., Koo, B.S., Lee, C., Chang, D., Lee, J., Jeong, K., Kim, H., Kim, J., Chee, S.: HIGHT: A New Block Cipher Suitable for Low-Resource Device. In: Goubin, L., Matsui, M. (eds.) CHES 2006. LNCS, vol.\u00a04249, pp. 46\u201359. Springer, Heidelberg (2006)"},{"key":"22_CR27","series-title":"Lecture Notes in Computer Science","volume-title":"Fast Software Encryption","year":"2010","unstructured":"Hong, S., Iwata, T. (eds.): FSE 2010. LNCS, vol.\u00a06147. Springer, Heidelberg (2010)"},{"key":"22_CR28","doi-asserted-by":"crossref","unstructured":"Khovratovich, D., Nikolic, I.: Rotational Cryptanalysis of ARX. In: Hong and Iwata [27], pp. 333\u2013346","DOI":"10.1007\/978-3-642-13858-4_19"},{"key":"22_CR29","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"315","DOI":"10.1007\/978-3-540-76900-2_19","volume-title":"Advances in Cryptology \u2013 ASIACRYPT 2007","author":"L.R. Knudsen","year":"2007","unstructured":"Knudsen, L.R., Rijmen, V.: Known-Key Distinguishers for Some Block Ciphers. In: Kurosawa, K. (ed.) ASIACRYPT 2007. LNCS, vol.\u00a04833, pp. 315\u2013324. Springer, Heidelberg (2007)"},{"key":"22_CR30","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"16","DOI":"10.1007\/978-3-642-15031-9_2","volume-title":"Cryptographic Hardware and Embedded Systems, CHES 2010","author":"L.R. Knudsen","year":"2010","unstructured":"Knudsen, L.R., Leander, G., Robshaw, M.J.B.: PRINTcipher: A Block Cipher for IC-Printing. In: Mangard, S., Standaert, F.-X. (eds.) CHES 2010. LNCS, vol.\u00a06225, pp. 16\u201332. Springer, Heidelberg (2010)"},{"key":"22_CR31","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"126","DOI":"10.1007\/978-3-642-10366-7_8","volume-title":"Advances in Cryptology \u2013 ASIACRYPT 2009","author":"M. Lamberger","year":"2009","unstructured":"Lamberger, M., Mendel, F., Rechberger, C., Rijmen, V., Schl\u00e4ffer, M.: Rebound Distinguishers: Results on the Full Whirlpool Compression Function. In: Matsui, M. (ed.) ASIACRYPT 2009. LNCS, vol.\u00a05912, pp. 126\u2013143. Springer, Heidelberg (2009)"},{"key":"22_CR32","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"196","DOI":"10.1007\/978-3-540-74619-5_13","volume-title":"Fast Software Encryption","author":"G. Leander","year":"2007","unstructured":"Leander, G., Paar, C., Poschmann, A., Schramm, K.: New Lightweight DES Variants. In: Biryukov, A. (ed.) FSE 2007. LNCS, vol.\u00a04593, pp. 196\u2013210. Springer, Heidelberg (2007)"},{"key":"22_CR33","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"243","DOI":"10.1007\/11604938_19","volume-title":"Information Security Applications","author":"C. Lim","year":"2006","unstructured":"Lim, C., Korkishko, T.: mCrypton \u2013 A Lightweight Block Cipher for Security of Low-Cost RFID Tags and Sensors. In: Kwon, T., Song, J., Yung, M. (eds.) WISA 2005. LNCS, vol.\u00a03786, pp. 243\u2013258. Springer, Heidelberg (2006)"},{"key":"22_CR34","unstructured":"Mace, F., Standaert, F.-X., Quisquater, J.-J.: ASIC Implementations of the Block Cipher SEA for Constrained Applications. In: RFID Security - RFIDsec 2007, Workshop Record, Malaga, Spain, pp. 103\u2013114 (2007)"},{"key":"22_CR35","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"226","DOI":"10.1007\/3-540-45450-0_19","volume-title":"Information Security and Privacy","author":"L. May","year":"2002","unstructured":"May, L., Henricksen, M., Millan, W.L., Carter, G., Dawson, E.: Strengthening the Key Schedule of the AES. In: Batten, L., Seberry, J. (eds.) ACISP 2002. LNCS, vol.\u00a02384, pp. 226\u2013240. Springer, Heidelberg (2002)"},{"key":"22_CR36","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"16","DOI":"10.1007\/978-3-642-05445-7_2","volume-title":"Selected Areas in Cryptography","author":"F. Mendel","year":"2009","unstructured":"Mendel, F., Peyrin, T., Rechberger, C., Schl\u00e4ffer, M.: Improved Cryptanalysis of the Reduced Gr\u00f8stl Compression Function, ECHO Permutation and AES Block Cipher. In: Jacobson Jr., M.J., Rijmen, V., Safavi-Naini, R. (eds.) SAC 2009. LNCS, vol.\u00a05867, pp. 16\u201335. Springer, Heidelberg (2009)"},{"key":"22_CR37","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"260","DOI":"10.1007\/978-3-642-03317-9_16","volume-title":"Fast Software Encryption","author":"F. Mendel","year":"2009","unstructured":"Mendel, F., Rechberger, C., Schl\u00e4ffer, M., Thomsen, S.S.: The Rebound Attack: Cryptanalysis of Reduced Whirlpool and Gr\u00f8stl. In: Dunkelman, O. (ed.) FSE 2009. LNCS, vol.\u00a05665, pp. 260\u2013276. Springer, Heidelberg (2009)"},{"key":"22_CR38","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"69","DOI":"10.1007\/978-3-642-20465-4_6","volume-title":"Advances in Cryptology \u2013 EUROCRYPT 2011","author":"A. Moradi","year":"2011","unstructured":"Moradi, A., Poschmann, A., Ling, S., Paar, C., Wang, H.: Pushing the Limits: A Very Compact and a Threshold Implementation of AES. In: Paterson, K. (ed.) EUROCRYPT 2011. LNCS, vol.\u00a06632, pp. 69\u201388. Springer, Heidelberg (2011)"},{"key":"22_CR39","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"198","DOI":"10.1007\/978-3-642-19574-7_14","volume-title":"Selected Areas in Cryptography","author":"I. Nikoli\u0107","year":"2011","unstructured":"Nikoli\u0107, I.: Tweaking AES. In: Biryukov, A., Gong, G., Stinson, D.R. (eds.) SAC 2010. LNCS, vol.\u00a06544, pp. 198\u2013210. Springer, Heidelberg (2011)"},{"key":"22_CR40","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"247","DOI":"10.1007\/978-3-540-39887-5_19","volume-title":"Fast Software Encryption","author":"S. Park","year":"2003","unstructured":"Park, S., Sung, S.H., Lee, S., Lim, J.: Improving the Upper Bound on the Maximum Differential and the Maximum Linear Hull Probability for SPN Structures and AES. In: Johansson, T. (ed.) FSE 2003. LNCS, vol.\u00a02887, pp. 247\u2013260. Springer, Heidelberg (2003)"},{"key":"22_CR41","unstructured":"Poschmann, A.: Lightweight Cryptography - Cryptographic Engineering for a Pervasive World. Number\u00a08 in IT Security. Europ\u00e4ischer Universit\u00e4tsverlag, Published: Ph.D. Thesis, Ruhr University Bochum (2009)"},{"key":"22_CR42","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"37","DOI":"10.1007\/11958239_3","volume-title":"Progress in Cryptology - VIETCRYPT 2006","author":"M.J.B. Robshaw","year":"2006","unstructured":"Robshaw, M.J.B.: Searching for Compact Algorithms: cgen. In: Nguyen, P. (ed.) VIETCRYPT 2006. LNCS, vol.\u00a04341, pp. 37\u201349. Springer, Heidelberg (2006)"},{"key":"22_CR43","series-title":"Lecture Notes in Computer Science","volume-title":"New Stream Cipher Designs","year":"2008","unstructured":"Robshaw, M.J.B., Billet, O. (eds.): New Stream Cipher Designs. LNCS, vol.\u00a04986. Springer, Heidelberg (2008)"},{"key":"22_CR44","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"89","DOI":"10.1007\/978-3-540-85893-5_7","volume-title":"Smart Card Research and Advanced Applications","author":"C. Rolfes","year":"2008","unstructured":"Rolfes, C., Poschmann, A., Leander, G., Paar, C.: Ultra-Lightweight Implementations for Smart Devices \u2013 Security for 1000 Gate Equivalents. In: Grimaud, G., Standaert, F.-X. (eds.) CARDIS 2008. LNCS, vol.\u00a05189, pp. 89\u2013103. Springer, Heidelberg (2008)"},{"key":"22_CR45","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"publisher","first-page":"328","DOI":"10.1007\/978-3-642-21702-9_19","volume-title":"Fast Software Encryption","author":"M.-J.O. Saarinen","year":"2011","unstructured":"Saarinen, M.-J.O.: Cryptanalysis of Hummingbird-1. In: Joux, A. (ed.) FSE 2011. LNCS, vol.\u00a06733, pp. 328\u2013341. Springer, Heidelberg (2011)"}],"container-title":["Lecture Notes in Computer Science","Cryptographic Hardware and Embedded Systems \u2013 CHES 2011"],"original-title":[],"link":[{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1007\/978-3-642-23951-9_22.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,11,23]],"date-time":"2020-11-23T22:15:01Z","timestamp":1606169701000},"score":1,"resource":{"primary":{"URL":"http:\/\/link.springer.com\/10.1007\/978-3-642-23951-9_22"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011]]},"ISBN":["9783642239502","9783642239519"],"references-count":45,"URL":"https:\/\/doi.org\/10.1007\/978-3-642-23951-9_22","relation":{},"ISSN":["0302-9743","1611-3349"],"issn-type":[{"value":"0302-9743","type":"print"},{"value":"1611-3349","type":"electronic"}],"subject":[],"published":{"date-parts":[[2011]]}}}