Unit 4: Public Key[Home] The key concepts are: Basics, RSA, Elliptic Curve and ElGamal. What you should know at the end of unit?
Presentations
LabPublic key challenge1. Bob has the following keys: -----BEGIN RSA PRIVATE KEY----- MIICXgIBAAKBgQDoIhiWs15X/6xiLAVcBzpgvnuvMzHBJk58wOWrdfyEAcTY10oG +6auNFGqQHYHbfKaZlEi4prAoe01S/R6jpx8ZqJUN0WKNn5G9nmjJha9Pag28ftD rsT+4LktaQrxdNdrusP+qI0NiYbNBH6qvCrK0aGiucextehnuoqgDcqmRwIDAQAB AoGAZCaJu0MJ2ieJxRU+/rRzoFeuXylUNwQC6toCfNY7quxkdDV2T8r038Xc0fpb sdrix3CLYuSnZaK3B76MbO/oXQVBjDQZ7jVQ5K41nVCEZOtRDBeX5Ue6CBs4iNmC +QyWx+u4OZPURq61YG7D+F1aWRvczdEZgKHPXl/+s5pIvAkCQQDw4V6px/+DJuZV 5Eg20OZe0m9Lvaq+G9UX2xTA2AUuH8Z79e+SCus6fMVl+Sf/W3y3uXp8B662bXhz yheH67aDAkEA9rQrvmFj65n/D6eH4JAT4OP/+icQNgLYDW+u1Y+MdmD6A0YjehW3 suT9JH0rvEBET959kP0xCx+iFEjl81tl7QJBAMcp4GZK2eXrxOjhnh/Mq51dKu6Z /NHBG3jlCIzGT8oqNaeK2jGLW6D5RxGgZ8TINR+HeVGR3JAzhTNftgMJDtcCQQC3 IqReXVmZaeXnrwu07f9zsI0zG5BzJ8VOpBt7OWah8fdmOsjXNgv55vbsAWdYBbUw PQ+lc+7WPRNKT5sz/iM5AkEAi9Is+fgNy4q68nxPl1rBQUV3Bg3S7k7oCJ4+ju4W NXCCvRjQhpNVhlor7y4FC2p3thje9xox6QiwNr/5siyccw== -----END RSA PRIVATE KEY----- -----BEGIN RSA PUBLIC KEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDoIhiWs15X/6xiLAVcBzpgvnuv MzHBJk58wOWrdfyEAcTY10oG+6auNFGqQHYHbfKaZlEi4prAoe01S/R6jpx8ZqJU N0WKNn5G9nmjJha9Pag28ftDrsT+4LktaQrxdNdrusP+qI0NiYbNBH6qvCrK0aGi ucextehnuoqgDcqmRwIDAQAB -----END RSA PUBLIC KEY----- Alice sends him the following ciphered message: uW6FQth0pKaWc3haoqxbjIA7q2rF+G0Kx3z9ZDPZGU3NmBfzpD9ByU1ZBtbgKC8ATVZzwj15AeteOnbjO3EHQC4A5Nu0xKTWpqpngYRGGmzMGtblW3wBlNQYovDsRUGt+cJK7RD0PKn6PMNqK5EQKCD6394K/gasQ9zA6fKn3f0= What is the message? You might find some interesting code [here]. 2. Bob uses the following parameters for his public key: RSA Encryption parameters. Public key: [e,N]. e: 65537 N: 498702132445864856509611776937010471 Cipher: 96708304500902540927682601709667939 Can you crack the cipher and find the value, if you know we are using using 60 bit primes [example]? Sample Exam QuestionsThe following are sample questions for public key:
Examples
Quick demos
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