Paper 2012/600

The LED Block Cipher

Jian Guo, Thomas Peyrin, Axel Poschmann, and Matt Robshaw


We present a new block cipher LED. While dedicated to compact hardware implementation, and offering the smallest silicon footprint among comparable block ciphers, the cipher has been designed to simultaneously tackle three additional goals. First, we explore the role of an ultra-light (in fact non-existent) key schedule. Second, we consider the resistance of ciphers, and LED in particular, to related-key attacks: we are able to derive simple yet interesting AES-like security proofs for LED regarding related- or single-key attacks. And third, while we provide a block cipher that is very compact in hardware, we aim to maintain a reasonable performance profile for software implementation.

Note: This version is an update from the original article published at CHES 2011, and describes a minor modication to the original LED specifications

Available format(s)
Secret-key cryptography
Publication info
Published elsewhere. CHES 2011
lightweightblock cipherRFID tagAES
Contact author(s)
thomas peyrin @ gmail com
2012-10-25: received
Short URL
Creative Commons Attribution


      author = {Jian Guo and Thomas Peyrin and Axel Poschmann and Matt Robshaw},
      title = {The LED Block Cipher},
      howpublished = {Cryptology ePrint Archive, Paper 2012/600},
      year = {2012},
      note = {\url{}},
      url = {}
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