sobhi mansour, in the book al-quran va kafa masdara li al-tashri' al-islami, tries to introduce the quran as the single source of islamic legislationaccording to quran itself and therefore to prove the lack of authority of traditions.he maintains that according to quranic verses, quran is a complete andcomprehensive book, has declared itself to be sufficient for the guidance, and hasforbid...

Mohamed Sobhi has been struggling to get into books for most of his life. Unable to read normal size text because of his low vision – a bilateral impairment that cannot be corrected by lenses, therapy or medical/surgical interventions – he started out by using photocopiers to enlarge the text, a time-consuming process that also generated reams of paper. When scanners came along he dispensed wit...

al-mansour mohammad ibn-e abi amer was the mighty chamberlain of hisham (moayyad), the omavite caliph of andalusia (caliphate 366-399). his period is simultaneous with the beginning of the moslems' military weakness and the anarchic circumstances in the rule of moslems over andalusia, as the christians dared to transgress the borderlines of, andalusia, and plunder and kill people there. al...

Cogliati et al. introduced the tweakable Even-Mansour cipher constructed from a single permutation and an almost-XORuniversal (AXU) family of hash functions with tweak and key schedule. Most of previous papers considered the security of the (iterated) tweakable Even-Mansour cipher in the single-key setting. In this paper, we focus on the security of the tweakable Even-Mansour cipher in the mult...

Recent results by Alagic and Russell have given some evidence that the Even-Mansour cipher may be secure against quantum adversaries with quantum queries, if considered over other groups than (Z/2)n. This prompts the question as to whether or not other classical schemes may be generalized to arbitrary groups and whether classical results still apply to those generalized schemes. In this paper, ...

The Even-Mansour structure and the chopMD mode are two widely-used strategies in hash function designs. They are adopted by many hash functions including two SHA-3 finalists, the JH hash function and the Grøstl hash function. The Even-Mansour structure combining the chopMD mode is supposed to enhance the security of hash functions against collision and preimage attacks, while our results show t...