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Proper authentication responses


System responses to authentication failures must not indicate which part of the authentication was incorrect.


Authentication forms are one of the most publicly accessible parts of an application, which makes them more susceptible to be attacked. Most authentication mechanisms require only a username and a password. If the responses to authentication attempts indicate which authentication parameter was incorrect, attackers may be able to obtain a list of valid usernames (user enumeration) that they can use in brute force attacks.

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This requirement is verified in following services




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