Medieval Security Techniques

2021-02-12 20:05

Sonja Drummer describes two medieval security techniques.

The first is a for authentication: a document has been cut in half with an irregular pattern, so that the two halves can be brought together to prove authenticity.

The second is for integrity: hashed lines written above and below a block of text ensure that no one can add additional text at a later date.

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https://www.schneier.com/blog/archives/2021/02/medieval-security-techniques.html

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