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What is Secure Plain?

April 26, 2017plain Secure

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What is Secure Plain?

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Plain TeX is the first TeX format, and it is describe in Don Knuth’s The TeXbook. Secure Plain (secplain) is a special TeX format, based on Plain that prevents the user doing many bad things (we hope). For example, secplain denies users direct access to most of TeX’s primitive commands.