What is opaque in digest authentication?
OPTIONAL A string of data, specified by the server, which should returned by the client unchanged. The Digest-MessageDigest header indicates that the server wants to communicate some info regarding the successful authentication (such as a message digest or a receipt of some kind).
Is HTTP digest authentication secure?
Digest authentication is secure due to the way it passes authentication information over the network. Usernames and passwords are never sent. Instead, IIS uses a message digest (or hash) to verify the user’s credentials.
How does HTTP digest authentication work?
Specifically, digest access authentication uses the HTTP protocol, applying MD5 cryptographic hashing and a nonce value to prevent replay attacks. Hash values are affixed to the person’s username and password before they are sent over the network, enabling the provider’s server to authenticate the person.
What is HTTP basic and digest authentication?
Basic and digest authentiation are alternative authentication mechanisms which are popular in web applications. However, basic authentication transmits the password as plain text so it should only really be used over an encrypted transport layer such as HTTPS. …
What is digest nonce?
1 : to distribute or arrange systematically : classify. 2 : to convert (food) into absorbable form. 3 : to take into the mind or memory especially : to assimilate mentally.
What is SIP digest?
The SIP protocol uses the Digest Authentication scheme that is used with the HTTP authentication mechanism, which by default uses MD5 as the default algorithm. This document updates the Digest Access Authentication scheme used by SIP to add support for SHA2 digest algorithms to replace the MD5 algorithm.
Should I use digest authentication?
Something you should NEVER EVER use. Doesn’t protect the password in transit and requires the server to store passwords in plain. Digest does provide better in-transit security than Basic authentication for unencrypted traffic, but it’s weak.
What is SSL digest?
The message digest is a fixed length value that cannot be easily reversed. The message digest is encrypted to form the Message Authentication Code (MAC), using the sender’s private key, and then it is decrypted at the other end by using the sender’s public key.
What is Digest in API?
Message digest algorithms are used to ensure data integrity. These algorithms produce a fixed-length message digest (hash) of the data using a key and variable size data strings as input. In short, a message digest is a fingerprint of the data.
What is digest method?
The digest method is the algorithm used to hash the Reference. The default algorithm is SHA256. Due to collision problems with SHA1, Microsoft recommends a security model based on SHA256 or better. For more information about XML digital signatures, see the W3C specification.
What is meant by digest authentication?
Digest authentication is a method of authentication in which a request from a potential user is received by a network server and then sent to a domain controller. The domain controller sends a special key, called a digest session key, to the server that received the original request.
How is digest created?
Message Digest is used to ensure the integrity of a message transmitted over an insecure channel (where the content of the message can be changed). The message is passed through a Cryptographic hash function. This function creates a compressed image of the message called Digest.
What is the opaque field in HTTP digest access?
If you drill into the An Extension to HTTP : Digest Access Authentication RFC, they define opaque as follows: opaque: A string of data, specified by the server, which should be returned by the client unchanged. It is recommended that this string be base64 or hexadecimal data.
How is the HTTP digest authentication scheme used?
HTTP provides a simple challenge-response authentication mechanism that may be used by a server to challenge a client request and by a client to provide authentication information. This document defines the HTTP Digest Authentication scheme that can be used with the HTTP authentication mechanism.
What’s the difference between SIP and digest authentication?
In HTTP authentication, an attacker can simply capture a packet containing the password and base64 encoded, which is then used to decode and perform attacks. Not secure, indeed. Digest Authentication, used both by SIP and HTTP, introduces the ability to only save an encrypted version of the password on the server.
What is the difference between basic and digest access authentication?
RFC 2617 HTTP Authentication June 1999 Like Basic, Digest access authentication verifies that both parties to a communication know a shared secret (a password); unlike Basic, this verification can be done without sending the password in the clear, which is Basic’s biggest weakness.