“On page 41, Singh writes, “The cipher of Mary Queen of Scots clearly demonstrates that a weak encryption can be worse than no encryption at all.” What does Singh mean by this and what does it imply for those who would attempt to keep their communications secret through cryptography?” (Question 1)
When encrypting messages, having a weak cipher can severely jeopardize the security of the message that is trying to be hidden. In the example in the book, Mary Queen of Scots was oblivious to the fact that her encrypted messages were being solved easily, and because of this, she and Babington made clear in their “secret” message that the plan was to kill Elizabeth. Had they not only encrypted their message but also made vague the exact components of their plan, it is possible that there wouldn’t have been enough evidence against Mary Queen of Scots. If instead they had used no encryption, it is likely that they wouldn’t have been so open and clear about discussing their plans. This most likely wouldn’t have helped their plan work that much better, though it could have possibly saved Mary Queen of Scots from being executed.
The notion that “a weak encryption can be worse than no encryption at all” is a good rule that all cryptographers should abide by. This pushes cryptographers to focus hard on making extremely strong ciphers, especially in today’s society where technology makes it much easier to crack codes in short periods of time. And, while encrypting messages, cryptographers should also make sure to keep their messages vague, so that only the intended recipient who knows the context should be able to decipher the decrypted message. Having a strong encryption and a specific message designed only for the recipient almost completely ensures privacy.
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