Which property is the one-way property and is important if the authentication technique involves the use of a secret value?

Which property is the one-way property and is important if the authentication technique involves the use of a secret value?

The fourth property, the one-way property, states that it is easy to generate a code given a message but virtually impossible to generate a message given a code. This property is important if the authentication technique involves the use of a secret value (Figure 11.5e).

In which mode of encryption if an attacker reorders the blocks of ciphertext then each block will still decrypt successfully?

In the ECB mode of encryption if an attacker reorders the blocks of ciphertext then each block will still decrypt successfully, however, the reordering may alter the meaning of the overall data sequence. 6. Message encryption alone provides a secure form of authentication.

Which of the following algorithms is found to be suitable for both digital signature and encryption?

RSA

What is achieved by a cryptographic algorithm applied to the message or to a small block of data that is a function of the message?

achieved by a cryptographic algorithm applied to the message or to a small block of data that is a function of the message. The security of the Diffie-Hellman key exchange lies in the fact that, while it is relatively easy to calculate exponentials modulo a prime, it is very easy to calculate discrete logarithms.

Why can’t I digitally sign a PDF?

In order for you to sign over the top of another persons signature, you would need to have blank signature fields (one for you AND another user) already placed in the PDF before the first signature is signed.

Why digital signature is not working?

When you try to register a Digital Signature Certificate (DSC) or upload a form with signature on it, you may face errors such as, “Your Certifying Authority (CA) is not trusted. Please use a trusted CA”. “User Id against this Digital Certificate already exists.” • “Your certificate has been revoked.”

How do I fix a digital signature in PDF?

Step 1: Open the PDF document in Adobe Reader showing the “At least one signature has problems” error.

1. Step 2: Click on the Signature Panel button, which will be on the right of the error.
2. Step 3: Click on the Validate all link.
3. Step 4: Click OK to validate all the signatures.

How do I enable an electronic signature in Adobe?

How to collect electronic signatures:

1. Open a PDF file in Acrobat DC.
2. Click the Fill & Sign tool in the right pane.
3. Add a recipient: Enter an email address and add a custom message if you want.
4. Create your form and signature fields:
5. Send your form:

How do I do electronic signature?

How do I create an electronic signature?

1. Draw your signature using your finger or a stylus. If you have access to a touchscreen, you can use your finger to create an electronic signature directly in your document.
2. Upload an image of your signature.
3. Use your cursor to draw your signature.
4. Use your keyboard to type in your signature.

Can you just type your name for an electronic signature?

An electronic signature can be a normal signature written out using a mouse or with a finger or stylus on a touchscreen. In some cases, all you need to do is type your name and acknowledge your consent.

What is Adobe electronic signature?

Adobe Sign, an Adobe Document Cloud solution is a cloud-based, enterprise-class e-signature service that lets you replace paper and ink signature processes with fully automated electronic signature workflows. With it, you can easily send, sign, track, and manage signature processes using a browser or mobile device.

Do electronic signatures hold up in court?

In summary, electronic signatures are binding and will hold up in court so long as they can be authenticated. One way to ensure the authentication process is to use an electronic signature company such as DocuSign, since courts have already ruled a signature using DocuSign is presumptively valid.