1. At N, Beuchat J, Okamoto E, San I, Yamazaki T (2014) Compact hardware implementations of chacha, blake, threefish, and skein on FPGA. IEEE Trans Circuits Syst I Regul Pap 61(2):485–498
2. Aumasson J, Fischer S, Khazaei S, Meier W, Rechberger C (2008) New features of latin dances: Analysis of salsa, chacha, and rumba. In: Nyberg K
3. (ed) Fast Software Encryption, 15th International Workshop, FSE 2008, Lausanne, Switzerland, 2008, Revised Selected Papers, Springer, Lecture Notes in Computer Science, vol 5086, pp 470-488
4. Bernstein D (2008a) Chacha, a variant of salsa20. In: Workshop Record of SASC, pp 3–5
5. Lecture notes in computer science;DJ Bernstein,2008