The two strands of a DNA molecule are held together by hydrogen bonds that occur between the nitrogen bases of both strands. The hydrogen bonds occur between the adenine and t â¦ hymine nitrogen bases and between the cytosine and guanine nitrogen bases.Hydrogen boding occurs between Nitrogen or oxygen atoms (containing lone pairs of electrons in their outer orbital) and hydrogen atoms.n DNA hydrogen bonds are typically found between the Nucleobases; the four chemicals that act to transcript the genetic code, Cytosine, Guanine, Adenine, and Thymine.   â¦  These bases are attached to the sugar and phosphate backbone of the DNA ladder, and the bases themselves make up the rungs.
A cipher (pronounced SAI-fuhr) is any method of encrypting text (concealing its readability and meaning). It is also sometimes used to refer to the encrypted text message itself although here the term ciphertext is preferred.
The encryption algorithm is the chain of calculations that determine what ways the input plain text will be transformed into the output ciphertext. In the simple example above there was only one calculation carried out, which moved each letter of the message one forward in the alphabet.