How to encrypt a dicom iamge?

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Dicom image has 2 parts: header data and pixel data.
For encryption, I am using an AES-GCM algorithm. It has :

Inputs: Plaintext, key, initialization vector
Outputs: Cipher text, Tag

These are the inputs and outputs of AES GCM algorithm used for encryption.

Now, I want to input DICOM image to this algorithm. So for that first, I take the header part of DICOM image, hash it using SHA-256 algorithm. Hence I get key and Initialization vector. Then I take the pixel data part and I get the plain text from this.

How to separately get the header data and pixel data separately in matlab?. Can somebody help me out?

What I have tried:

Till now, I could input the entire dicom image and perform hash function (SHA-256) and got the value.
But that is not what I want.I want to separately access the header and pixel dat?
What must be done? is there any way?

Posted 5-Mar-18 20:13pm

Member 13710872

Updated 5-Mar-18 21:41pm

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CPallini · Answer 1 · 2018-03-05T21:42:00

Solution 1

If you need to access (that is decrypt) them separately than encrypt them separately.

Posted 5-Mar-18 21:42pm

CPallini

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Member 13710872 6-Mar-18 9:27am

Yes exactly. But how to do the programming part. That is how to get the header and pixel data from the dicom image?