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12 Cards in this Set
- Front
- Back
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define Ciphertext |
text that has been mathematically scrambled so that its meaning cannot be determined without decryption |
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define Encryption Key |
input to the encryption algorithm that makes the encryption unique; reader must have the key |
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give the characteristics of Symmetrical Encryption |
fast, easy and LESS secure used in data stores (data at rest) a.k.a. "single key encryption" sender crates ciphertext and sends encrypted text to recipient |
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give the characteristics of Asymmetrical Encryption |
safer but more complex used for "data-in-motion" a.k.a. "public/private-key encryption" uses 2 paired encryption algorithms
**private must be used on one side and public on the other |
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how does a user acquire a public/private key pair? |
applies to a Certificate Authority (CA)
-CA registers public key on its server and send private to user |
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define Quantum Encryption |
uses the physical properties of light (photons) to generate seemingly uncrackable codes |
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define Digital Signature and explain how it works |
electronic means of identifying a person or entity
-uses public/private key technology to authenticate -authentication is based on the private key
*vulnerable to man-in-the-middle attacks: sender's private and public key are faked |
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define Digital Certificate |
provides a legally recognized electronic identifation of the sender
-based on a Public Key infrastructure: manages cryptographic keys |
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define Certification Authority (CA) |
manages and issues digital certificates & public keys; certifies ownership by user of certificate |
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2 most secure Internet Transmission Protocols |
1. Secure Socket Layer (SSL): combo of encryption schemes based on a PKI (public key infrastructure)
2. Secure Hypertext Transfer Protocol (S-HTTP): directs messages to secure ports using SSI-like cryptography |
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define Secure Electronic Transaction (SET) |
uses multiple encryption schemes based on a PKI -used for online credit card transactions -used by the intermediary between bank and customer |
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define VPN |
secure way to connect to a private LAN from a remote location |
