When was the RSA cryptosystem invented and patented?
Wednesday, 13 September 2023
by Silvio Pereira
The RSA cryptosystem, a cornerstone of modern public-key cryptography, was invented in 1977 by Ron Rivest, Adi Shamir, and Leonard Adleman. However, it is important to note that the RSA algorithm itself was not patented in the United States until 2020. The RSA algorithm is based on the mathematical problem of factoring large composite numbers,
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, Introduction to public-key cryptography, The RSA cryptosystem and efficient exponentiation
Tagged under:
Cybersecurity, Decryption, Encryption, Factoring, Public Key Cryptography, RSA Cryptosystem
For the RSA cryptosystem to be considered secure how large should be the initial prime numbers selected for the keys computing algorithm?
Tuesday, 12 September 2023
by Silvio Pereira
To ensure the security of the RSA cryptosystem, it is indeed crucial to select large prime numbers for the keys computing algorithm. In fact, it is recommended to choose prime numbers that are at least 512 bits in length, and in some cases even larger, such as twice or four times as much. The security
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, Conclusions for private-key cryptography, Multiple encryption and brute-force attacks
Tagged under:
Composite Numbers, Cybersecurity, Key Computing Algorithm, Prime Numbers, RSA Cryptosystem, Security