Security Weaknesses of ▇▇▇▇ et al Sample Clauses

Security Weaknesses of ▇▇▇▇ et al s Scheme‌ In this section, we analyze the security of ▇▇▇▇ et al.’s scheme [28]. ▇▇▇▇ et al. claim that the scheme can withstand different types of attacks; however, based on attacker capabilities in Section 1.3, we found that their scheme is still vulnerable to smart card loss attack, and is also susceptible to denial of service attack, because it uses the incorrect verification method. In addition, we found that their scheme cannot preserve user anonymity. Since user’s identity included in a login request message is in plain-text form when it transmitted to GW-node in login phase. In detail, user’s identity on a public channel can be easily exposed to attackers, because they are able to eavesdrop on a public channel, as mentioned in Section 1.3. Furthermore, ▇▇▇▇ et al.’s scheme missed a verification process to test input password, which led to the inefficiency problem. Since it is not able to detect an incorrect password during login phase, the login request message composed of incorrectly entered password sends to GW-node, and then GW-node detects the wrong message while performing a checking process on the login request message. Generally, the verification on the input password is recommended to perform immediately in login phase to avoid inefficiency problem [40]. We now describe the detailed weaknesses of ▇▇▇▇ et al.’s schemes.
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