- Over 20 years after the implementation of the…data encryption standard,…Nest issued a request for proposal for an…encryption standard to replace DES…as a government standard.…Requirements included many of the same…original requirements such as efficient,…flexible, and simple symmetric block cipher.…However, new requirements specified the algorithm…needed to support a block size of 128 bits…and support key lengths of 128,…192, and 256 bits.…
It was also to be available on a worldwide,…non-exclusive royalty-free basis.…Over a dozen participants published algorithms.…The Rijndael algorithm was selected…and now is the official standard…which became standard in 2002.…AES is used in all modern applications,…including IEEE 802.11i.…AES is not a Feistel network in that it doesn't swap sides.…
It processes the entire block through a set of…four operations from nine to 11 rounds…depending on key length.…From a 128 bit block of plain text…and 128 bit key,…each block of text goes through…different transformations including…substitute bytes, shift rows,…
Author
Lisa Bock
Released
8/12/2015- Differentiate between confidentiality, integrity, and accountability.
- Compare symmetric and asymmetric encryption.
- Describe the Feistel Cipher.
- Differentiate between block and stream ciphers.
- Explain what Secure Sockets Layer (SSL) is used for.
- Define Internet Protocol Security (IPSec) and explain how it works.
- Explain the transport mode in IPSec.
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 17s
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1. Network Security
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2. Symmetric Encryption
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Using Wireshark to crack WEP4m 17s
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3. Asymmetric Encryption and Digital Signatures
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Managing keys3m 38s
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Using certificates3m 3s
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4. Hash Algorithms, Message Digests, and Authentication
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5. Secure Sockets Layer (SSL)
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6. Email Security
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7. Internet Protocol Security
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Using operating mechanisms3m 16s
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Conclusion
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Next steps55s
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Video: Working with the Advanced Encryption Standard (AES)