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Front Matter Pages i-xv. Pages Graphical Processing Units. Encryption in GPUs.
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Remotely Keyed Cryptographics. Related Issues. The CPU has traditionally been used for general purpose computing. Usually, the CPU has limits on how many processing cores it can accommodate. This makes GPU largely suited for password cracking. Cloud computing is rapidly provisioned on demand configurable resources that can be shared with minimal management effort or service overhead . There are two types of cloud—public and private. Public cloud is a cloud service offered by the cloud.
A Private cloud is exclusively provisioned for a certain group of users. Because of the flexibility and the cost effectiveness every company is.
Figure 4. In my paper I will demonstrate how effective is GPU based, password cracking using cloud platform. Also analyze the reason behind the password hash cracking effectiveness based on password strength. The data will be collected once the test is performed and the benchmark report, as well as the generated passwords, will be the source of the data which will later be analyzed. Figure 5.
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Cloud computing offered solutions and their comparison . The following hardware and software will be used in conducting my research. The exact software and Hardware details are in the table. For the test, different filters and combination of uppercase letters, lowercase letters, digits, special characters will be used.
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The test will be done using the hybrid attack at first before applying brute force attacks where every combination of the characters will be tried. Table 2. GPU test machine. Table 3. CPU test machine. Figure 6. Testing environment. Figure 7. Installing oclhashcat. The following sample password hash has been selected. Figure 8. For the sake of our test, we will be keeping it to minimal, less than 10 Figure 9. We applied the different filter as follows:.
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Figure 9. Python Bcrypt password hash Generator sample code. We also conducted an experimental run where we applied fixed characters in certain positions to observe any improvements in timing. The way we estimated 8 char long password cracking time with lowercase and special characters are as follows:. Figure MD5 cracking performance with CPU machine. MD5 cracking performance with GPU machine. We could not finish the all the combination of 8 chars, but we estimated it will take around 4 days to finish checking all the possible combination of 8-char password using our GPU machine.
The way we estimated the cracking time as follows:. It took around 3 hours to finish checking 7 char length passwords while for all the 8 field of the password and for the 8-char long password. Though we could not finish 8 char passwords, but we estimated it will take around 10 days and 10 hours to finish checking all the combination of the 8 char field.
The estimated time is calculated as follows:. The estimation is calculated as follows:. It takes 15 hours 4 mins to finish going through all the combination of the 3-char length.
Security of Password Hashing in Cloud
Bcrypt cracking performance with CPU machine. Bcrypt cracking performance with GPU machine. To go through all the combination of 3 char length passwords it takes 23 mins while to 4 char length passwords it takes 4 hours 30 mins only.
It finished checking all the combination of 5 char length passwords in about 10 mins. It takes 2 hours 40 mins to finish going through all the combination of the 3-char length.
One such sample random password generator script is given in Figure Alphanumeric Password generator script. Sharon rated it really liked it Jul 14, Mycirenae Shelton rated it really liked it Jan 01, Rita rated it it was amazing Oct 17, Lori rated it it was amazing Jun 11, Deby Decker rated it it was amazing Sep 23, Tanya rated it really liked it Oct 19, Shannon Moeck rated it really liked it Jan 18, Jessica rated it really liked it May 16, Ahnah marked it as to-read Sep 18, Wanda marked it as to-read Sep 19, Betty Macy marked it as to-read Sep 19, D marked it as to-read Sep 20, Desiree marked it as to-read Sep 24, Patricia Dugan marked it as to-read Sep 28, Jeanette marked it as to-read Oct 02, Melanie marked it as to-read Oct 10, Robynn marked it as to-read Oct 11, Tamela Sutler marked it as to-read Oct 12, Debra marked it as to-read Oct 16, Sabiha Ahmed marked it as to-read Oct 23, Ilani K.
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