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Running head: PRINCIPLES OF INFORMATION SECURITYSecurity Concepts and SkillsStudents NameInstitution1PRINCIPLES OF INFORMATION SECURITYChapter 8: CryptographyIn the current era, information is the backbone for the operation of an organization. Thus,securing information is advantageous to an organization. Cryptography is the act of employingcodes as a means of securing information which embraced different approaches including bitstream and block cipher among others (Whitman & Mattord, 2011). The approach to beundertaken depends on the type of text in question. The aforementioned methods bit stream andblock cipher, are used when ciphering plaint texts. Substitution cipher involves the substitutionof one value with another value while the transposition cipher employs the use of an alreadyexisting pattern to rearrange the block. Vernam cipher and book-based ciphers are other methodsof ciphering. The ciphering techniques can either encrypt or decrypt information. For example,the vernam cipher encrypts while the book-based cipher technique decrypts information. I alsolearned that cryptography employs the use of different tools including the essential publicinfras ...


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