Flashcards
Security
Cards in this deck (17)
- 1Properties of a secure connection1. Secrecy
2. Integrity
3. Authenticity
4. Non-reduplication
5. Availability - 2Types of Cryptography1. Symmetric Key
2. Public Key - 3Symmetric Key CryptographyBoth parties share the same key.
Key is used for encryption and decryption. - 4Public Key CryptographyPublic key is used to encrypt message and private key is used to decrypt messages.
- 5Digital Signatureyou can use a public key to decrypt a message that was encrypted by the private key. This way people know the person who signed it has access to the private key.
- 6DESData Encryption Standard
56 bit key (really small) - 7Triple Desuses 2 keys and is back wards compatable with des if k1=k2
m->E1->D2->E1 - 8AESAdvanced Encryption Standard
128,192,256 bit keys.
Multiple modes of use - 9RSA Algorithmm^e mod n = c
c^d mod n = m - 10Message DigestsFixed length Cryptographic hash of a message. One way translation
- 11DKIMDomain Key Identification Mail.
way of tying public keys to domains using DNS - 12PKIPublic Key Infrastructure
certificates digitally signed by a certificate authority (CA) - 13CACertificate Authority
-Different levels, lower ones must be validated by a higher one. - 14Certificates-Digitally signed
-has exp date
-Can be revoked - 15Perfect Forward Secrecykeys will not be comprimised even if one of the private keys is leaked.
- 16Diffie Hellman Key ExchangeN is the value to mod by
G is some prime generator (Nonce)
above must be agreed upon before
(G^B)^A mod N = sym key = (G^A)^B mod N - 17KerberosProtocol used to establish session keys using public key encryption. Used in many operating systems. Tells you how to talk to the next person and a message vouching for you
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- Computer Science (Networking) Flashcards on Security, created by Shaun Leung on 16/04/2019.
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- Shaun Leung
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