Cracking Monoalphabetic Ciphers

The video explains mono alphabetic ciphers, a type of substitution cipher where each character in the plaintext is replaced with another character. Despite the numerous possible substitutions, these ciphers are easily broken using statistical analysis based on the frequency of letters in a language. The video details how common letters like 'E' in English can be identified in a cryptogram, making decryption straightforward. Due to their simplicity and vulnerability, mono alphabetic ciphers are not considered secure encryption methods today.

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