@article{MAKHILLJEAS2019142318716, title = {On Some Specific Patterns of τ-Adic Non-Adjacent Form Expansion over Ring Z (τ)}, journal = {Journal of Engineering and Applied Sciences}, volume = {14}, number = {23}, pages = {8609-8615}, year = {2019}, issn = {1816-949x}, doi = {jeasci.2019.8609.8615}, url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2019.8609.8615}, author = {F.,S.M.,Sh.K.,M.R.K and}, keywords = {element,expansion,Frobenius map,successively,τ-adic non-adjacent form,Koblitz curve,TNAF}, abstract = {Let τ=(-1)1-a+√-7/2 for a∈{0, 1} is Frobenius map from the set Ea(F2m) to it self for a point (x, y) on Koblitz curves Ea. Let P and Q be two points on this curves. τ-adic Non-Adjacent Form (TNAF) of α an element of the ring Z(τ) = {α = c+dτ|c, d∈Z} is an expansion where the digits are generated by successively dividing α by τ, allowing remainders of -1, 0 or 1. The implementation of TNAF as the multiplier of scalar multiplication nP = Q is one of the technique in elliptical curve cryptography. In this study, we find the formulas for TNAF that have specific patterns [0, c1, …, c1-1], [-1, c1, …, c1-1], [1, c1, …, c1-1] and [0, 0, 0, c3, c4, …, c1-1].} }