Western Town College offers an introduction to cryptography course. The course covers the motivation for cryptography given increased reliance on technology, defines cryptography as the science of encrypting and decrypting data using math problems, and discusses how modern cryptography relies on computing and problems being mathematically intractable. The course also provides a brief overview of the history of cryptography and concludes by emphasizing cryptography's important role in security.

1. Western Town College
Introduction to Cryptography
Bruno Taboada

2. Schedule
● Motivation
● What is it?
● A brief history.
● How does it work?
● Conclusion

3. Motivation
● Recently we have a generation of people more
and more dependent on information technology
but many of them don't have any idea about
risks involved on it.
● Facebook, Cell Phones, Notebooks and any
others are able to store data digitally.

4. What is it?
● Cryptography is the science of using the math
to encrypt and decrypt data.
● In my own words, Cryptography is the study of
techniques to ensure the integrity,
confidentiality and authentication.

5. How does it work?

6. How does it work?
● All means of cryptography are based on
intractability of a problem mathematics
● The most famous are whole number or the
discrete logarithm problems.
● Both methods are efficient.

7. A brief history.
● The earliest forms of secret required nothing
more than a piece of paper and writing as a
much of people couldn't read.

8. A brief history.

9. A brief history.

10. A brief history

11. A brief history

12. A brief history

13. A brief history

14. At Present

15. Conclusion
● From now on, We will never have anymore
cryptography without computing.
● For security reasons, the next wars in the world
will use as much cryptography as possible.
● The cryptography always has been a important
role in the humanity.
● Doesn't exist secure without cryptography.