1. Prompt user to enter a (enter data) or b (show all data) If a is chosen, enter firstName, lastName if b show all existing data.

Encrypt the message DEFEND using the RSA system with n = 43*59 and e = 13.  First translate each letter into an integer and group together pairs of integers, so you have three 4-digit numbers (padding 0’s in the front if necessary).  Work with each of these numbers to encrypt them.  The ciphertext should also be three 4-digit numbers.

The following is a message encrypted using affine cipher and you know the multiplicative key is 7 and the additive key is 3. Decrypt the message and show all your work. RFS DEY DCL CFA XXV HDE YFO REV WVO VEX VHD EYF ORE VAD BQO BOW EYD WVF ORF XVK XLP YBO BEL QDB XEV WDH BOW EYF OTF ORA DBQ OFO ROB ELQ BAA NQD XLA EX

The following is a message encrypted using multiplicative cipher but you do not know the key. Decrypt the message and show all your work. VNY LYQ EHH VNY TSD DYL YRO YSR VNY KWL HTJ YVK YYR NEF SRI QWM YVN SRI VWQ EUE RTN EFS RIV WQE UQW MYV NSR I

you were sent this message to decrypt using RSA: 543221766605541460 Your public information is n = 958297 and e = 65537.Your private information is p = 967 and q = 991 what is ? (n)?

Authentication in today's internet world seems like a daunting endeavor; please explain the reasons why this is the case.

The following is a message encrypted using keyword cipher and you know the keyword is CYBERSECURITY and the key letter is “a”. Decrypt the message and show all your work. OIR GJN OTG KJM OCH OCO OTO PER OIC OBC HYR SJM GRE TNO ICO JSE RNT MRO JUJ JHF RCM HTH U

I'm having trouble getting this book's entry code. Is there any way you could help me find it or tell me how to look for it on my Yuzu account?