Examples of applying Kasiski examination and Index of Coincidence along with Frequency analysis to restore cryptographic key of Vigenere encypted ciphertext and decrypt it.
I think you might need to explain what you are or were trying to attempted as it seems that no matter what encrypted text you have you will always get the same out deciphered out put..
Chosen key length: 8
Encrypted data
OBKRUOXOGHULBSOLIFBBWFLRVQQPRNGKSSOTWTQSJQSSEKZZWATJKLUDIAWINFBNYPVTTMZFPKWGDKZXTJCDIGKUHUAUEKCAR
Restored key: POLITICS
Plaintext: ALTHOUGHJANEISNOTPARTICULARLYIMPRESSEDWITHJORDANSWORKRANKINGHIMBELOWSOMEOFHEROTHERREPORTSSHEDOESNOTWANTCONFLICTSOSHEDECIDESTOGRANTJORDANWHATHEREQUESTSANDKEEPHIMHAPPYUNSURPRISINGLYJORDANSCOLLEAGUESREGARDHIMASMANIPULATIVEANDPUSHYBUTTHEYDECIDETONOTRAISETHEISSUEINTHEHOPETHATJANEAPPRECIATESTHEIRATTITUDEANDTHATTHEIRACHIEVEMENTSSPEAKFORTHEMSELVESSADLYTHEIRSTRATEGYISFARLESSEFFECTIVETHANJORDANSWHICHCAUSESMOREOFJANESREPORTSTOBULLYHERINTOAPROMOTIO
I found the exact phrase on this web site ... https://hbr.org/2017/10/how-office-politics-corrupt-the-search-for-high-potential-employees