Course

Cryptography

Cryptography is the practice of protecting information in a way that keeps eavesdroppers from learning valuable info. Learn about cryptographic methods, symmetric and asymmetric cryptosystems, hashing, digital certificates, trust models, PKIs, and password cracking.

    Syllabus

  • Symmetric block modes Video — 00:08:14
    • Symmetric block algorithms have limitations depending on which kind of cipher is used. This episode explores the different block modes.

  • Cryptographic methods Video — 00:07:18
    • This episode introduces various methods used to protect the critical keys in cryptography that keep communication secure.

  • Cryptography basics Video — 00:15:56
    • Cryptography is the practice of disguising information in a way that looks random. This episode explores the history of cryptography and how it has evolved into the complex systems today.

  • Password cracking demo Video — 00:06:08
    • Dan demonstrates how to use a password cracking tool to turn hashed passwords into cleartext.

  • Cryptographic attacks Video — 00:05:22
    • In this episode, Mike explains how encrypted information is at risk and explores ways to protect it.

  • Certificate types Video — 00:14:10
    • Mike reviews different types of certificates including Web, e-mail, code-signing, machine/computer, and user.

  • SSH public key authentication lab Video — 00:09:03
    • Multifactor authentication should always be used for administrative accounts. In this demo, SSH public key authentication is configured for a Linux host.

  • Trust models Video — 00:04:44
    • Web of trust is a mostly outdated method of proving identities; however, it is helpful to understand as the predecessor of public key infrastructure (PKI) which is widely used today.

  • Hashing Video — 00:08:42
    • Hashes provide assurance of data integrity using fascinating mathematical calculations. Passwords are a very common use for hashing.

  • Asymmetric cryptosystems Video — 00:12:47
    • In this episode, Mike describes encrypting and decrypting data with different keys and the magic that happens when key pairs are generated.

  • Symmetric cryptosystems Video — 00:12:41
    • In this episode, Mike describes encrypting and decrypting data with the same key. He also covers how symmetric algorithms can either be block or streaming and use various types of ciphers depending on which one is used.

  • Data protection Video — 00:08:36
    • Data are not all the same. Whether data are at rest, in use, or in transit will affect how you can best secure it.

  • Security+ – Cryptography Lab — 00:30:00
    • When using the Internet, users retrieve or share information. Depending on the application, purpose, and implementation methods, the need to provide data confidentiality, integrity, and authenticity emerges. To ensure these requirements are fulfilled and that only authorized parties have access to the data, the information transmitted over the Internet is obfuscated.

  • Password cracking Video — 00:10:12
    • Passwords are often stored in hash format but can still be susceptible to attacks. The various password attacks include brute force, dictionary, and rainbow table. Salting and key stretching add another layer of security to hashed passwords.

  • Touring certificates Video — 00:08:47
    • Mike tours various certificates in this episode.

  • Ask me anything Video — 00:01:44
    • Digital cryptocurrencies provide a centralized public way to pay for goods and services. This video explains the relationship between cryptocurrency, public ledgers and the blockchain.

  • Public Key Infrastructure Video — 00:03:38
    • In this episode, Mike discusses public key infrastructure (PKI), used to enable commerce and other secure activities over the Internet.

  • Exam question review Video — 00:02:27
    • Protecting sensitive data can be done using many techniques. In this episode , the viewer is tested on the best security control for a given scenario.

  • Understanding digital certificates Video — 00:07:39
    • Digital certificates are used in many different places to verify the identity of a public key owner. They can also include verification from third parties for an added layer of security.

  • Diffie-Hellman Video — 00:06:34
    • Learn the Diffie-Hellman key exchange agreement and methods in this very complex algorithm.

Syllabus

Course description

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We use Infosec Skills to provide continuous training to our technicians and to prepare them for various certifications. Infosec Skills allows us to create personalized training programs that focus on each of our technicians’ particular roles and see their progress as they take courses. We also, recommend it to clients to make their IT support teams better.

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