Data encryption is an important security measure for sensitive data stored on computers. Pupils learn how to utilize matrices for creating code. They also get a great review of matrix multiplication, inverse matrices, and the identity...

Take a serious look at an equally serious topic! Security scholars explore and discuss the methods hackers use to gain access to personal information during a well-written digital citizenship activity. Part of an extensive series, the...

Turn students into detectives as they decipher encrypted messages.  Introduce your class to modular arithmetic and have a little fun encrypting and decoding secret messages. The activity does not hit many content standards, but...

Middle schoolers visualize a communication system. They encode, decode, transmit, receive and store messages. Students use a code sheet and flashlight for this process. They will also maintain a storage sheet from which they can retrieve...

Students secure information online using cryptography. For this algebra lesson, students use RSA technology to encrypt information on the internet. They use modular reduction of natural numbers to understand prime number theory.

Students use math to solve encrypted messages.

Use paint to teach about cryptography. Scholars explore public key cryptography by attempting to mix a secret color using paint. After the activity, they investigate the Diffie-Hellman method using prime numbers, exponents, and modular...

Students explain that a code is a system of symbols, letters, words, or signals that are used instead of ordinary words and numbers to send messages or to store information. They practice deciphering a variety of secret codes used in...

In this Algebra II instructional activity, 11th graders find the determinant of 2x2 or 3x3 matrix and use the determinant to find the inverse of the matrix.  The two page instructional activity contains explanation of topic, a...

Students examine digital images and how satellites orbiting Earth send information and pictures to Earth over the Internet. They use a digital camera to put pictures on a computer and decode a satellite image from space.

In this food pyramid activity, students fill in the 5 boxes at the bottom of the food pyramid and draw or color foods within the 5 food pyramid areas.

Learn how symmetric encryption techniques help protect computer data.

A huge amount of private data is sent around the Internet every day: emails with details about our personal lives, passwords that we type into login screens, tax documents that we upload to servers. Learn more about the need for data...

Find out about data encryption, decryption and cracking computer data to avoid virsus and cyberattacks.

A thorough discussion of the business and professional uses of encryption.

Learn how public key encryption can protect computer data.

Learn how public key encryption can send that data safely between computer systems.

Find out why we need to encrypt computer data to avoid hackers.

This student activity about public key encryption allows learners to simulate encrypt and decrpyt messages without having to share a password to unlock them.

Julius Caesar encrypted messages two thousand years ago. By knowing the techniques of deciphering a code--frequency analysis, known text, and brute force--one can begin to understand the three key aspects of data encryption, decryption,...

Students simulate sending a secret message to a friend via the internet, attempting to deliver the message safely and securely.

Check your understanding of cryptography and public key encryption.

This activity explores the dominating set problem, and sets it up as the basis for a the public key encryption activity.

Wikipedia provides a basic definition of encryption, and distinguishes between the two encryption methods: symmetric and asymmetric key algorithms.