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The future of the Internet, especially in expanding the range of applications, involves a much deeper degree of privacy, and authentication. Without these the Internet cannot be properly used to replace existing applications such as in voting, finance, and so on. The future is thus towards data encryption which is the science of cryptographics , and provides a mechanism for two entities to communicate without any other entity being able to read their messages. In a secret communications system, Bob and Alice should be able to communicate securely, without Eve finding out the contents of their messages, or in keeping other details secure, such as their location, or the date that their messages are sent. The two main methods used are to either use a unique algorithm which both Bob and Alice know, and do not tell Eve, or they use a well-known algorithm, which Eve also knows, and use some special electronic key to uniquely define how the message is converted into Ciphertext, and back again. A particular problem in any type of encryption is the passing of the secret algorithm or the key in a secure way, as Bob or Alice does not know if Eve is listening to their communications. If Eve finds-out the algorithm or the key, neither Bob nor Alice is able to detect this. This chapter looks at some of the basic principles of encryption, including the usage of private-key and public-key methods. As we will find public and private key methods work together in perfect harmony, with, typically, private key methods providing in the actual core encryption, and public key methods providing ways to authenticate, and pass keys.
CSJ DWCWFJ RD CSJ ZLCJFLJC, JXOJYZKBBI ZL JPOKLTZLA CSJ FKLAJ RD KOOBZYKCZRLX, ZLQRBQJX K UWYS TJJOJF TJAFJJ RD OFZQKYI, KLT KWCSJLCZYKCZRL. MZCSRWC CSJXJ CSJ ZLCJFLJC YKLLRC EJ OFROJFBI WXJT CR FJOBKYJ JPZXCZLA KOOBZYKCZRLX XWYS KX ZL QRCZLA, DZLKLYJ, KLT XR RL. CSJ DWCWFJ ZX CSWX CRMKFTX TKCK JLYFIOCZRL MSZYS ZX CSJ XYZJLYJ RD YFIOCRAFKOSZYX , KLT OFRQZTJX K UJYSKLZXU DRF CMR JLCZCZJX CR YRUUWLZYKCJ MZCSRWC KLI RCSJF JLCZCI EJZLA KEBJ CR FJKT CSJZF UJXXKAJX. ZL K XJYFJC YRUUWLZYKCZRLX XIXCJU, ERE KLT KBZYJ XSRWBT EJ KEBJ CR YRUUWLZYKCJ XJYWFJBI, MZCSRWC JQJ DZLTZLA RWC CSJ YRLCJLCX RD CSJZF UJXXKAJX, RF ZL GJJOZLA RCSJF TJCKZBX XJYWFJ, XWYS KX CSJZF BRYKCZRL, RF CSJ TKCJ CSKC CSJZF UJXXKAJX KFJ XJLC. CSJ CMR UKZL UJCSRTX WXJT KFJ CR JZCSJF WXJ K WLZNWJ KBARFZCSU MSZYS ERCS ERE KLT KBZYJ GLRM, KLT TR LRC CJBB JQJ, RF CSJI WXJ K MJBB-GLRML KBARFZCSU, MSZYS JQJ KBXR GLRMX, KLT WXJ XRUJ XOJYZKB JBJYCFRLZY GJI CR WLZNWJBI TJDZLJ SRM CSJ UJXXKAJ ZX YRLQJFCJT ZLCR YZOSJFCJPC, KLT EKYG KAKZL. K OKFCZYWBKF OFREBJU ZL KLI CIOJ RD JLYFIOCZRL ZX CSJ OKXXZLA RD CSJ XJYFJC KBARFZCSU RF CSJ GJI ZL K XJYWFJ MKI, KX ERE RF KBZYJ TRJX LRC GLRM ZD JQJ ZX BZXCJLZLA CR CSJZF YRUUWLZYKCZRLX. ZD JQJ DZLTX-RWC CSJ KBARFZCSU RF CSJ GJI, LJZCSJF ERE LRF KBZYJ ZX KEBJ CR TJCJYC CSZX. CSZX YSKOCJF BRRGX KC XRUJ RD CSJ EKXZY OFZLYZOBJX RD JLYFIOCZRL, ZLYBWTZLA CSJ WXKAJ RD OFZQKCJ-GJI KLT OWEBZY-GJI UJCSRTX. KX MJ MZBB DZLT OWEBZY KLT OFZQKCJ GJI UJCSRTX MRFG CRAJCSJF ZL OJFDJYC SKFURLI, MZCS, CIOZYKBBI, OFZQKCJ GJI UJCSRTX OFRQZTZLA ZL CSJ KYCWKB YRFJ JLYFIOCZRL, KLT OWEBZY GJI UJCSRTX OFRQZTZLA MKIX CR KWCSJLCZYKCJ, KLT OKXX GJIX.
This table shows the occurances of the letters in the text (ignoring the case of the letters):
This table shows how the text matches a normal probability to text (where 'E' has the highest level of occurance and 'Z' has the least). The grey rows show what would be expected for the order, and the red one shows what your text gives for the order: