Questions

Now it's time to check your knowledge. Select the best response, then check your answers with those found in the Assessment section at the end of the book.

1. In _____, Ray Tomlinson created electronic mail (email).

   a. 1968

   b. 1972

   c. 1992

   d. 1998

2. When protecting data, _____ ensures that data is not modified, lost, or destroyed in either an accidental or unauthorized manner.

   a. integrity

   b. confidentiality

   c. availability

   d. authentication

3. A digital _____ is a cryptographic technique using asymmetric encryption that ensures a message is authentic and has not been modified or altered while in transit.

   a. breadcrumb

   b. cookie

   c. rail fence

   d. signature

4. When malicious actors often use an email address that spoofs the name to look like someone you know, this is a violation of _____.

   a. integrity

   b. confidentiality

   c. availability

   d. authentication

5. _____ encryption uses a pair of keys: a public key and a private key.

   a. Verified

   b. Asymmetric

   c. Symmetric

   d. SHA-1

6. _____ ciphers substitute each letter with a different letter according to the key.

   a. Allocation

   b. Substitution

   c. Transposition

   d. Pigpen

7. The rail fence, or zig-zag, cipher is a _________ cipher that conceals data by using "rails" or separate lines of text.

   a. allocation

   b. substitution

   c. transposition

   d. pigpen