ciphertext-only attack
[/ˈsaɪ.fər.tɛkst ˈoʊn.li əˈtæk/]
nounpl: ciphertext-only attacks
ataque apenas com texto cifrado
1. A cryptanalytic attack in which an attacker has access only to encrypted messages (ciphertext) without access to corresponding plaintext messages, encryption keys, or other additional information.
In a ciphertext-only attack, the adversary must deduce the plaintext or the encryption key by analyzing patterns and statistical properties of the encrypted data alone.
Em um ataque apenas com texto cifrado, o adversário deve deduzir o texto plano ou a chave de criptografia analisando apenas padrões e propriedades estatísticas dos dados criptografados.
2. The most restrictive scenario for a cryptanalyst where success depends on identifying weaknesses in the encryption algorithm itself or exploiting redundancy in the plaintext language.
Modern encryption algorithms are designed to be secure against ciphertext-only attacks through strong mathematical foundations.
Os algoritmos de criptografia modernos são projetados para serem seguros contra ataques apenas com texto cifrado através de fundações matemáticas fortes.
This term is fundamental in cryptography education in both Brazil and the USA. In academic settings and cybersecurity professionals' discourse, it represents the most challenging attack scenario and is often used to evaluate the strength of encryption algorithms. The term is language-agnostic in technical circles due to the global nature of cryptographic research.
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