Errata: *November 3, 2018*

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## Page 123, Bad typography in Diffie-Hellman example

**A = g**^{a} mod p = 56 mod 23 = 8 should be **A = g**^{a} mod p = 5^{6} mod 23 = 8

**B = g**^{b} mod p = 515 mod 23 = 19 should be **B = g**^{b} mod p = 5^{15} mod 23 = 19

**key = B**^{a} mod p = 196 mod 23 = 2 should be **key = B**^{a} mod p = 19^{6} mod 23 = 2

**key = A**^{b} mod p = 815 mod 23 = 2 should be **key = A**^{b} mod p = 8^{15} mod 23 = 2

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The example for "Diffie-Hellman key exchange with small values" uses incorrect typography for the exponents. The equations should be corrected as follows:

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