38747672
Description
Flashcards by Lyndsay Badding, updated more than 1 year ago
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Created by Lyndsay Badding
over 2 years ago
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| Question | Answer |
| Stream Ciphers | RC4, CFB, OFB symmetric key algorithms encrypt plaintext to ciphertext, either one bit or byte at a time easier to reverse, but fast than block ciphers |
| Block Ciphers | AES, DES, 3DES, ECB, GCM, MD5, Blowfish, Twofish symmetric key algorithms encrypt plaintext to ciphertext, most commonly in 64-bit blocks harder to reverse, but slower than stream ciphers |
| Symmetric Encryption | AES, DES, 3DES, Blowfish, Twofish, RC4 |
| Asymmetric Encryption | part of PKI RSA. DH, DSA, ElGamal, ECC |
| Ephemeral Keys | asymmetric encryption keys that are generated for each key exchange, may be used more than once in a session exist for a short period of time |
| Elliptical Curve | = ECC leverages the algebraic structures of elliptic curves over finite fields to derive public/private key pairs |
| Cipher Suites | generated to identify specific types of encryption on info based on 4 elements: 1. the key exchange algorithm RSA, DH, ECDH, ECDHE 2. the authentication algorithm RSA, DSA, ECDSA 3. the bulk encryption algorithm AES, 3DES 4. the MAC algorithm SHA, MD5 |
| Hashes | SHA-1, SHA-2, MD5, RIPEMD |
| CRC | used for message integrity verification |
| Key Stretching | a way to strengthen weak passwords uses salting and hashing repeatedly BCRYPT, PBKDF2 |
| Checksums | essentially hashes, typically used to check the integrity of files or packets |
| Homomorphic Encryption | allows data to be analyzed without making the data visible |
| PKI | built around a server that creates, issues, and stores digital certificates |
| Key Escrow | is a service provided by a company to secure a backup of the keys by the client company to its employees, systems, and websites |
| Certificate Formats and Purpose | DER (.cer) - binary encoded, does not include private keys PEM (.pem, .cer, .crt) - Base 64 ASCII encoded PKCS#7 (.p7b) - includes public key, cert info, cert chain PKCS#12 - includes both keys, cert info + extended properties, cert chain |
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