International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
e-ISSN: 2395 -0056
www.irjet.net
p-ISSN: 2395-0072
A COUNTERMEASURE FOR SECURITY INTENSIFICATION IN CLOUD USING CaPGP [1]Mohanambal. [1]Assistant
K, [2]Preetha. S, [3]Sakthi Priya. N, [4]Sindhuja. C, [5]Sowmiya. A.
professor(O.G), Department of Information Technology, Valliammai Engineering College. Students, Department of Information Technology, Valliammai Engineering College, Tamil Nadu, India.
[2][3][4][5]UG
Abstract
countermeasure is provided to overcome these attacks. The concept of CAPTCHA as Puzzle and Graphical Password (CaPGP) is used to intensify the security. The advancement in technology where Optical Character Reader (OCR) [2] is used to crack the text based CAPTCHA’s which has become more prone to malware attacks. So, image based CAPTCHA’s replaces the text based CAPTCHA.
- The malware attacks attempt to deplete the
cloud services with bogus request which is a major threat in cloud. A mechanism to intensify the login security in cloud is suggested. The concept of CaPGP – CAPTCHA as Puzzle and Graphical Password is introduced because CAPTCHA is one
The computational cost at client side is made stronger than at the server side using CPU only code block. The attacker is able to hack the sensitive data by resolving the puzzle using Graphical Processing Unit (GPU) [1]. The GPU has the ability to compute millions of code instructions in a limited amount of time. Thus GPU enables the attacker to easily resolve the computation at lower cost, thus simultaneously reducing the complexity of the attacker. Hence, CPU only code blocks are exploited to defeat against the GPU-inflated attacks.
way to discriminate human and malware apart. The computations at the client side are made intensive than on the server side by making the malwares fail to resolve and attempt to attack. The client is made to resolve the software puzzle that is generated randomly with time constraints where the malware is defeated. The password is made stronger so as to counter the guessing attacks and cookies during login. CAPTACHA’s nowadays are cracked easily by Optical Character
Reader
(OCR)
which
proves
The randomly generated puzzle is made protective using secret keys and code protection mechanism. The protected puzzle is sent to the client who computes it with some constraints and submits to the server. The server in turn evaluates it with the original solution saved in the database. If both matches then the server permit the access to the services, else the access is denied.
the
technological advancement. Hence image based CAPTCHA which requires the verification task to be complete after the mouse click where OCR also fails. Moreover the proposed system shows how to implement the software puzzle in
1.2 CPU code block
generic server-browser model. Index terms:
Software puzzle, CaPGP, image based
The CPU processor is much slower than a GPU processor, but one CPU core is comparatively faster than one GPU core. The malwares try to resolve the puzzle algorithm using GPU processor so that the client side computations become less intensive. Thus, the GPU processors are much likely to the malware attacks. The existing puzzle algorithm, assumes that the malwares solves the puzzle using CPU, which is not always true. Currently the malwares use many core GPU to inflate computational capacity which decreases the computational cost ratio. To counter this issue, the generated puzzle in the proposed system could not be resolved using GPU processor. Hence CPU code block is
CAPTCHA’s, Optical Character Reader.
I. INTRODUCTION According to the statistics, 70% of the users limit themselves to utilize cloud services, due to several attacks prevailing in cloud. The major attacks include Denial-ofService attack, Online Guessing attack, and Malware attack. These attacks attempt to deplete our sensitive data in cloud. The seriousness of these attacks has led to the advent of numerous defense mechanisms. Thus, a
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