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Eccouncil 212-81 Exam Questions
- Topic 1: Information Theory Cryptography Concepts/ Multi-Alphabet Substitution
- Topic 2: Introduction and History of Cryptography/ Breaking the Vigenère Cipher
- Topic 3: Symmetric Cryptography & Hashes/ Single Substitution Weaknesses
- Topic 4: Symmetric Block Cipher Algorithms/ Basic Facts of the Feistel Function
- Topic 5: International Data Encryption Algorithm (IDEA)/ History of Cryptography
- Topic 6: Number Theory and Asymmetric Cryptography/ Advanced Encryption Standard (AES)
- Topic 7: Propagating Cipher-Block Chaining (PCBC)/ Naor-Reingold and Mersenne Twister Pseudorandom Function
- Topic 8: Server-based Certificate Validation Protocol/ Classification of Random Number Generator
- Topic 9: Shiva Password Authentication Protocol (S-PAP)/ Challenge-Handshake Authentication Protocol (CHAP)
- Topic 10: Point-to-Point Tunneling Protocol (PPTP)/ National Security Agency and Cryptography
- Topic 11: Cracking Modern Cryptography: Ciphertext-only and Related-key Attack/ Cracking Modern Cryptography: Chosen Plaintext Attack
- Topic 12: Steganography Implementations/ Example of Symmetric Stream Ciphers: RC4
- Topic 13: Birthday Paradox: Probability/ Mono-Alphabet Substitution
- Topic 14: Cracking Modern Cryptography/ Example of Symmetric Stream Ciphers: PIKE
Free Eccouncil 212-81 Exam Actual Questions
Note: Premium Questions for 212-81 were last updated On Mar. 24, 2025 (see below)
In steganography, ________ is the data to be covertly communicated (in other words, it is the message you wish to hide).
Payload
https://en.wikipedia.org/wiki/Steganography
The payload is the data covertly communicated. The carrier is the signal, stream, or data file that hides the payload, which differs from the channel, which typically means the type of input, such as a JPEG image. The resulting signal, stream, or data file with the encoded payload is sometimes called the package, stego file, or covert message. The proportion of bytes, samples, or other signal elements modified to encode the payload is called the encoding density and is typically expressed as a number between 0 and 1.
Which one of the following wireless standards uses AES using the Counter Mode-Cipher Block Chaining (CBC)-Message Authentication Code (MAC) Protocol (CCMP)?
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