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Security Flaws Could Allow Hackers to Change PDF Contracts

The new research provides a weird little look at how online goons could mess with your documents, should they be so inclined. ....

University Bochum , Ruhr University Bochum , Sneaky Signature Attack , Evil Annotation Attack , Adobe Inc , Security Hacker , Computer Network Security , Computer Security ,

PDFs may have even more security flaws than we thought

Researchers demonstrate how attackers can exploit a couple of vulnerabilities to make changes to certified PDFs. ....

University Bochum , Ruhr University Bochum , Sneaky Signature Attack , Evil Annotation Attack ,

Two new attacks break PDF certification

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IMAGE: IT experts at RUB have found several security issues with digital signatures for PDF documents over the past years.
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Credit: RUB, Kramer
A security issue in the certification signatures of PDF documents has been discovered by researchers at Ruhr-Universität Bochum. This special form of signed PDF files can be used, for instance, to conclude contracts. Unlike a normal PDF signature, the certification signature permits certain changes to be made in the document after it has actually been signed. This is necessary to allow the second contractual party to also sign the document. The team from the Horst Görtz Institute for IT Security in Bochum showed that the second contractual party can also change the contract text unnoticed when they add their digital signature, without this invalidating the certification. The researchers additionally discovered a weakness in Adobe products that enables attackers to implant malicious code into th ....

Simon Rohlmann , Vladislav Mladenov , Christian Mainka , Data Security , Sneaky Signature Attack , Evil Annotation Attack , Technology Engineering Computer Science , Computer Science , System Security Hackers , தகவல்கள் பாதுகாப்பு , தொழில்நுட்பம் பொறியியல் கணினி அறிவியல் ,