Now you only had to share the public key and you could be assured that no one else has the private key. This was a huge thing in cryptography because up until this point we only had symmetric cryptography where you both had to know the same secret key and it had to be shared between the sender and the receiver. Because the two keys are different this is known as asymmetric encryption. The public key can also be used to encrypt a message to send to the private key owner that no one else can decrypt. It also means you can verify that the message came from the owner of the private key. The great thing about this is the public key can be known by everyone an can be used to decrypt messages from the owner of the private key. RSA is a public-key encryption system where an encryption/decryption key is published for everyone to know and a second decryption/encryption key is kept secret or private. The RSA algorithm was published in in 1977, but again, there was an equivalent system that was developed by the British signals intelligence agency (GCHQ) in 1973 1, but they kep this a secret.
He is also the co-discoverer fo the Adleman–Pomerance–Rumely primality test. Leonard Adleman is widely referred to as the Father of DNA Computing, where DNA is used to compute an algorithm. 2Īdi Shamir was a co-discoverer of Differential Cryptanalysis, which was later revealed to have been already known by IBM and the NSA. Ronald Rivest also invented RC2, 4, 5 and 6 symmetric key encryption algorithms as well as the well the MD2, 4, 5 and 6 family of hash functions. RSA is an acronym made up from the surnames of its inventors 1: I might be wrong.View Learn Encryption with Python on GitHub RSA Encryption and Decryption Ps: Checking for multiple values of plaintext,it may be happening because n=3127 and any plaintext greater than 3127 will not produce the original plaintext upon decryption. Plaintext = (ciphertext**privateKey) % (self.n)Ĭonsidering the algorithm will be used to encrypt/decrypt alphanumeric text, which will produce large numeric values, what modifications are needed or am I missing something? The code for the same is here, def encrypt(plaintext):Ĭiphertext = (plaintext**publicKey) % (self.n) Here, after the decryption, the computed plaintext is 619 (which should be 10000) Input: p=53 q=59 e=3 plaintext = 10000 (private key computed as 2011)
Here, the decryption gives 1000 as the plaintext, which is correct. Input: p=53 q=59 e=3 plaintext = 1000 (private key computed as 2011) Works fine for smaller values for plaintext (numeric value). While implementing RSA encryption/decryption (using python), the plaintext doesn't match with the decrypted ciphertext for large values of plaintext.
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