Password Change Phase Sample Clauses
The Password Change Phase clause outlines the procedures and requirements for updating or resetting user passwords within a system or service. Typically, this clause specifies when users must change their passwords, such as after a security breach or at regular intervals, and may detail the steps involved in the password change process, including authentication and password strength requirements. Its core practical function is to enhance security by ensuring that passwords are updated regularly or in response to potential threats, thereby reducing the risk of unauthorized access.
Password Change Phase. In case of changing her or his password, MU inserts her or his smart card into a card reader and performs the following steps:
Password Change Phase. When ▇▇ wants to change pwi with the new pwni, ▇▇ performs the password change phase. Figure 4 illustrates the password change phase, which is performed as follows:
Step 1: Ui imprints BIOi∗ and computes Ri∗ into SCi. = Rep(BIOi∗, Pi), then inputs {IDi∗, Ri∗, pwi∗, pwni} Step 2: SCi computes HPWi∗ = h(pwi∗ ||Ri∗ ), XS∗i = Ci ⊕ h(IDi∗ ||HPWi∗ ), Bi∗ = h(HPWi∗ ⊕ XS∗i ). Then, SCi verifies Bi∗ = Bi to check the validity of Ui. If it is correct, SCi computes updated values HPWni = h(pwni||Ri∗ ), Ani = Ai ⊕ h(HPWi||XS∗i ) ⊕ h(HPWni||XS∗i ), Bni = h(HPWni ⊕ XS∗i ), Cni = XS∗i ⊕ h(IDi∗ ||HPWni). Then, SCi replaces (Ai, Bi, Ci) with (▇▇▇, Bni, Cni).
Password Change Phase. || || ⊕ ⊕
(1) Ui inserts Ui’s smart card into a terminal and inputs IDi, the old password PWi and new password PWi∗. The smart card compares the entered value IDi with the IDi stored in the smart card. If this condition is not satisfied, it terminates this phase. Otherwise, the smart card proceeds with the next step.
(2) The smart card computes PWi = h(PWi b), PWi∗ = h(PWi∗ b) and Ni∗ = Ni PWi PWi∗.
(3) The smart card replaces the existing value Ni with the new value Ni∗. Finally, the smart card contains the information {IDi, Ni∗, h(·), b}. User (U )
i i Inputs (IDi, PWi, PWi∗) Checks ID =? stored ID PWi = h(PWi||b)
Password Change Phase. Step 1: Ui inputs {IDi∗, pwi∗, pwni} into SCi, where pwni is a new password.
Step 2: The smart card computes RNr∗ = h(pwi∗ ) ⊕ XPWi, HPWi∗ = h(pwi∗ ||RNr∗ ), XS∗i = Ci ⊕ = h(IDs||HPWi∗ ), Bi∗ = h(HPWi∗ ⊕ XS∗i ), then checks Bi∗ Bi. If it is correct, SCi computes updated values HPWni = h(pwni||RNr∗ ), Ani = Ai ⊕ h(HPWi∗ ||XS∗i ) ⊕ h(HPWni||XS∗i ), Bni = h(HPWni ⊕ XS∗i ), Cni = XS∗i ⊕ h(IDS||HPWni. Then, SCi replaces (Ai, Bi, Ci) with (▇▇▇, Bni, Cni).
Password Change Phase. When the userUi wants to update his password without the help of RC, he inserts his smart card to card reader and inputs (IDi , PWi ) corresponding to the smart card.
Password Change Phase. To change the password of A , the USB token of the client A must be inserted; the old PW and a newly chosen password PW must be entered. Then, the following steps are performed. Figure 4 shows the password change phase.
1. generate r.
2. ID, ME _ r 4. h(B'' )
Password Change Phase. Assume that SC has the ability to detect the login failure trials. If the failure times exceed a given number, SC will be soon locked to prevent from guessing password attack. • Ui inserts the smart card into a card reader and in- puts identity IDi, password PWi and a new pass- word PWnew. • SC calculates bt = B ⊕ ID ⊕ PW , Ct = C ⊕ 3 C3 = h(C1), C4 = h(bǁPWi) ⊕ h(xǁy).
Password Change Phase. In this phase, we argue that the user’s SC must have the ability to detect the login failure trials. Once the number of login failure exceeds a predefined system value, the SC must be locked immediately to prevent the exhaustive password guessing behavior. This phase involves the following steps.
Password Change Phase. When a mobile user MN wants to renew a password, MN can insert his smart card into the card reader and per- forms the following steps.
Step 1. Firstly, MN keys in the old password, and re- quests to renew password pw. Next, MN enters the new password pw∗.
Step 2. The smart card computes u∗ = u ⊕ h(pw) ⊕ h(pw∗), and replaces u with u∗. In this section, we will give an analysis for our protocol in terms of security, functionality, and efficiency.
Password Change Phase. C1 The algorithm is invoked whenever Ui wants to (Ci , pk ) . Additionally, both of above messages are random values relied on the random number α or β .