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Download DemoVendor: EC-COUNCIL
Certifications: ECES
Exam Code: 212-81
Exam Name: EC-Council Certified Encryption Specialist (ECES)
Updated: Mar 19, 2024
Q&As: 199
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Which of the following is a type of encryption that has two different keys. One key can encrypt the message and the other key can only decrypt it?
A. Block cipher
B. Asymmetric
C. Symmetric
D. Stream cipher
Correct Answer: B
Asymmetric Public-key cryptography, or asymmetric cryptography, is a cryptographic system that uses pairs of keys: public keys, which may be disseminated widely, and private keys, which are known only to the owner. The generation of such keys depends on cryptographic algorithms based on mathematical problems to produce one-way functions. Effective security only requires keeping the private key private; the public key can be openly distributed without compromising security.
Cylinder tool. Wrap leather around to decode. The diameter is the key. Used in 7th century BC by greek poet Archilochus.
A. Cipher disk
B. Caesar cipher
C. Scytale
D. Enigma machine
Correct Answer: C
Scytale https://en.wikipedia.org/wiki/Scytale A scytale is a tool used to perform a transposition cipher, consisting of a cylinder with a strip of parchment wound around it on which is written a message. The ancient Greeks, and the Spartans in particular, are said to have used this cipher in 7th century BC to communicate during military campaigns. The recipient uses a rod of the same diameter on which the parchment is wrapped to read the message. It has the advantage of being fast and not prone to mistakes--a necessary property when on the battlefield. It can, however, be easily broken. Since the strip of parchment hints strongly at the method, the ciphertext would have to be transferred to something less suggestive, somewhat reducing the advantage noted.
Which one of the following is an authentication method that sends the username and password in cleartext?
A. PAP
B. CHAP
C. Kerberos
D. SPAP
Correct Answer: A
PAP https://en.wikipedia.org/wiki/Password_Authentication_Protocol Password Authentication Protocol (PAP) is a password-based authentication protocol used by Point to Point Protocol (PPP) to validate users. Almost all network operating system remote servers support PAP. PAP is specified in RFC 1334. PAP is considered a weak authentication scheme (weak schemes are simple and have lighter computational overhead but are much more vulnerable to attack; while weak schemes may have limited application in some constrained environments, they are avoided in general). Among PAP's deficiencies is the fact that it transmits unencrypted passwords (i.e. in plain-text) over the network. PAP is therefore used only as a last resort when the remote server does not support a stronger scheme such as CHAP or EAP.
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