98 Mr. Chenevix oji a new Method 



and shews that it is possible to load this cipher with the defect 

 laid to the account of that which is in Rees^s Ci/clopcedia ; but 

 the admission of two symbols, or of one symbol composed of two 

 parts, has been studiously avoided. 



The twelve examples here stated have been written with one 

 single key, varying merely the value of the symbols. Therefore 

 the problem to be resolved is proposed under the simplest aspect 

 possible ; unless, indeed, the variation of the value of the sym- 

 bols, which, when only one key is used, is essential to extreme 

 secrecy, be abstracted. Such, however, is the security of this 

 cipher in itself, and the generality of the principles upon which 

 it is constructed, that when two keys are used, and the four 

 additional symbols admitted, the variation of the value of the 

 symbols may be dispensed with ; and such is the form in which 

 this cipher offers the greatest practical utility, together with 

 sufficient compass to attain the indispensable object of secrecy. 

 So great is its power even in that state, that Europe may be 

 ciphered in 6,400 different ways, changing one letter each time; 

 Asia in 256; and Emancipation in 2,621,440. In this very 

 reduced condition, it is submitted to similar trial as the former ; 

 and a known sentence is ciphered in two different ways, by the 

 help of which an unknown sentence, ciphered also in two difFer- 

 ent ways, maybe deciphered, if the security of the method be 

 not extreme. The known sentence is the same as that ciphered 

 in ciphers 1,2, 3, 4, and 5. 



Cipher No. 13. 



grts dcwb zlwe algr u4fy kwlci) wajr y(pud iknp Iper xode 

 aojk wxuvicve mxtf hkl8 xvs^ orlu igb<i> myaj fkeo anpu xled 

 guwy wrds ferd n(psu ebuf stjf ^ko8 4wmy ucy4 <i)jfx vwzc enif 

 povm gwxe 4tlu byi4 ucth men4 mmf j er^j qy4m ekrd dyqr rjro 

 8bvg p8<pj gpm. 



Cipher No. 14, of the same sentence. 



Knwx envd jalu dfum gfsd jvwt szkb 4iyp 4yc(p fx8m mqrd 

 dS^g Imgw pn^h rmwl qgwb m^xa h<pfy <pn8j x4dz lyuq Ijxy 

 ymau luyv ysbt skhd uctx t8(i>y yxok wigh 8ylv ynki bnnp dtan 



