the use of an encryption key, which specifies how the message is to be encoded. Any adversary that can see the ciphertext should not be able to determine anything about the original message. An authorized party, however, is able to decode the ciphertext using a decryption algorithm, that usually requires a secret decryption key that adversaries do not have access to. For technical reasons, an encryption scheme usually needs a key-generation algorithm to randomly produce keys. There are two basic
Words: 1540 - Pages: 7
Air wants to exchange secure e-mail with users of the same customers. A password infrastructure is actually incapable of offering end-to-end secure e-mail among multiple users, and no such implementations exist. Technically, the servers that hold the passwords would have to get involved for every recipient, for every e-mail sent. The servers would also have access to either the contents of the e-mail or the secret key material that protects the confidentiality or
Words: 6278 - Pages: 26
examples on its use. First an explanation of Public Key Infrastructure, or PKI. A cryptographic system uses two keys, a public key known to everyone and a private key, the private key has full control to the key owner, and has to keep in secured environment. A unique feature to the public key system is that the public and private keys are related in such a way that only the public key can be used to encrypt messages and only the corresponding private key can be used to decrypt them. Moreover, it is
Words: 589 - Pages: 3
PKI infrastructure delivers for the generation, production, spreading, control, accounting and obliteration of public key certificates. PKI offers a selection of facilities containing issuance of digital certificates to individual users and servers, end-user enrollment software, assimilation with certificate directories. 7. Public key or asymmetric cryptography uses a pair of simultaneously generated keys to perform encryption and decryption. The private key is used to encrypt, the public key
Words: 468 - Pages: 2
Explain the role of a Certificate Authority and its obligations in authenticating the person or organization and issuing digital certificates. Certificate Authority or Certification Authority (CA) is an entity, which is core to many PKI (Public Key Infrastructure) schemes, whose purpose is to issue digital certificates to use by other parties. It exemplifies a trusted third party. 3. What would a successful Subversion Attack of a CA result in? An attacker can create a certificate for any domain
Words: 804 - Pages: 4
NT2580 DEREK GRASSER LAB 7 1. Describe the differences between symmetric key cryptography and Asymmetric key cryptography. Ans: Symmetric key cryptography is older and only uses one key to encrypt and decrypt. Asymmetric key cryptography is newer than symmetric and uses two different keys to decrypt and decrypt, a public key and a private key. 2. How can public key cryptography be used for nonrepudation? Ans: The cryptography will be able to tell who it came from and what time it
Words: 262 - Pages: 2
OF ALL… § Let me clear up a misconception § RSA public/private key encryption is THE leader, in terms of security. For all practical purposes, it is impossible to crack a RSA algorithm. § PGP (Pretty Good Privacy) is probably the best implementation of RSA. It is now owned by Symantec. § Other free products (which do not tightly integrate into email, for example) are available § Understand that PKI is NOT the same thing as public key encryption Fundamentals of Information Systems Security
Words: 1799 - Pages: 8
level are SSO(Single Sign On), TKIP(Temporal Key Integrity Protocol), and SSID(Service Set Identifier). 4. LLC (Logical Link Control) and MAC(Media Access Control) 5. A NAC System, or Network Access Control system, is a policy where limited access to resources is granted to a computer that was just connected to the network. Once everything is scanned and checked, the NAC will grant the appropriate level of access. 6. A Public Key Infrastructure is a framework that consists of programs, procedures
Words: 274 - Pages: 2
TRUE 5. It is good practice to change your password frequently. TRUE 6. A typical license agreement allows you to rent or lease the software. FALSE 7. Unencrypted, readable data is called ciphertext. FALSE 8. Private key encryption also is called asymmetric key encryption. FALSE 9. VPNs encrypt data to help ensure that data is safe from being intercepted by unauthorized people. TRUE 10. Although wireless access provides many conveniences to users, it also poses additional security
Words: 377 - Pages: 2
when a problem is resolved on the site. A suggestion we will provide to the fleet is that recognition will be provided for ships that contribute significant amounts of inputs to the wiki. Based on the success of this program, for the second increment we can implement database syncs between the ships and our shore site. When ships are at sea their off ship communications may not be very good and most sailors onboard do not have much bandwidth, so getting to the information on the NKB may prove to
Words: 811 - Pages: 4
