I look forward to seeing you in Crypto II where we will cover additional core topics and a few more advanced topics. Crypto is a beautiful topic with lots of open problems and room for further research. I hope everyone learned a lot and enjoyed the material. This is the last week of this Crypto I course. import rsa (pubkey, privkey) rsa.newkeys (1024) message bmy top secret crypto rsa.encrypt (message,pubkey) decrypt rsa. Please don't be shy about posting questions in the forum. This is my basic code that seems to work easily in Python 3.7 for RSA asymmetric encryption. The problem set this week involves a bit more math than usual, but should expand your understanding of public-key encryption. The lectures contain suggestions for further readings for those interested in learning more about CCA secure public-key systems. There has been a ton of research on CCA security over the past decade and given the allotted time we can only summarize the main results from the last few years. We construct systems that are secure against tampering, also known as chosen ciphertext security (CCA security). The videos cover two families of public key encryption systems: one based on trapdoor functions (RSA in particular) and the other based on the Diffie-Hellman protocol. Public key encryption is used for key management in encrypted file systems, in encrypted messaging systems, and for many other tasks. This week's topic is public key encryption: how to encrypt using a public key and decrypt using a secret key.
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