The Discrete Logarithm problem in the ElGamal cryptosystem over the abelian group U(n) Where n= p^m, or 2p^m. - Hayder Raheem Hashim (CoRR, 2014)

Image Encryption and Decryption in A Modification of ElGamal Cryptosystem in MATLAB. - Hayder Raheem Hashim; Irtifaa Abdalkadum Neamaa (CoRR, 2014)

Cryptanalysis of ITRU. - Hayder Raheem Hashim; Alexandra Molnár; Szabolcs Tengely (CoRR, 2020)

Markoff-Rosenberger triples and generalized Lucas sequences. - Hayder Raheem Hashim; László Szalay; Szabolcs Tengely (Period. Math. Hung., 2022)