![]() ![]() Errors in computation involving one prime factor might produce an invalid signature, potentially similar to the correct signature modulo another prime factor. The use of the Chinese Remainder Theorem (CRT) in RSA, aimed at faster decryption and reduced public key size, presents a potential vulnerability. The research, led by Keegan Ryan, Kaiwen He, Nadia Heninger, and George Arnold Sullivan, exposes faults in signature computation when using CRT-RSA, potentially allowing observers to calculate private keys from observed signatures. SSH, a widely used cryptographic network protocol for secure communication, relies on RSA, a public-key cryptosystem, for user authentication. This vulnerability reveals that, under specific circumstances, passive network attackers can extract secret RSA keys from errors occurring during failed SSH connection attempts. A collaborative study by researchers from universities in California and Massachusetts has uncovered a potential vulnerability affecting SSH (Secure Shell) connections. ![]()
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