Rsa is very simple actually

The algorithm, yeah, the implementation, no xD

The algorithm, yeah, the implementation, no xD

Choose 2 random primes, p,q(here just use like 20ish probabilistic tests) Let n=pq, then φ(n)=(p-1)(q-1) Let e=a fermat prime is usually preferred, any number usually work though Find d such that de=1 mod φ(n), check if 64d^4>N, if so choose another e(to prevent wiener attack) To encrypt do m^e mod n To decrypt do c^d mod n Modular exponential can be done in log(n) time, it’s basically square and multiply In the real world, chinese remainder theorem can be used to speed the exponentiation up There are many other attacks to beware off, to list a few: Related message(several similar messages, usually differing by a linear term) reuse(with different n, exponent) or coppersmith short pad attack Rsa bit decryption oracle(like if one of the bits for the decrypted msg is used to check for something, the whole msg can be decrypted) Blinding(forging messages) Small private exponent attack(wiener) Timing attacks Fault attacks(just one error in decryption can reveal the private key) Side channel attack(if you use vanilla rsa it is extremely easy to get the exponent during exponentiation by looking at the total power taken by the machine) For pkcs1 theres this fancy attack which tbh i cant rlly understand called the Bleichenbacher attack

www.google.com

Help me to do a better coding

What is this

Nothing inside

Hi, can anyone recommend a good book for C? Better if its For BCA student (optional) . Also better if its with lot of examples. I learn Better with examples. Very basic concepts are clear. Have to start from array. Arrays are bit familiar as well. But i feel like i need to understand it better. Feel like i don't yet understand arrays like i should. Loops, if else statements and basics before array are clear enough. I already bought hard copy of let us c by yashwant kanetkar. Is that enough? or should i also buy some other book as well.

you don't need to understand arrays well until you are like... pro level at C++

Its, let us c. Not, let us learn c. My mistake.. Edited Here is the link https://www.amazon.in/Let-Us-C-Yashavant-Kanetkar/dp/8183331637

Also be wary of the book Let Us C (16th Edition, 2017) by Yashwant Kanetkar. Some people view it as a horribly outdated book that teaches Turbo C and has lot of obsolete, misleading and downright incorrect material.

Hello admin Is JAVA use pointer concept??

hello admin

Huh, you can understand the idea behind arrays without understanding pointers

No

Do you know whats java lol

How sir?

Do you know whats java lol

Saying "you don't need to understand arrays" is big bullshit

Saying "you don't need to understand arrays" is big bullshit

tho in high lvl arrays arent pointers anymore

Saying "you don't need to understand arrays" is big bullshit

"you don't need to understand whats behind arrays"

Yeah, but still understand arrays.

Hey do u know any array that changes size apart from pointers and lists/vector