%0 Journal Article %T A New Signature Scheme Based on Multiple Hard Number Theoretic Problems %A E. S. Ismail %A N. M. F. Tahat %J ISRN Communications and Networking %D 2011 %I Hindawi Publishing Corporation %R 10.5402/2011/231649 %U http://dx.doi.org/10.5402/2011/231649