Based on these two photos, they are basically fake.
Fake because, 1, the portrait printing is too rough, 2, the paper of the banknote is greasy and rich in drugs, and 3, the signature on the banknote does not match the year on the banknote.
Compare yourself, eyes, expression, facial contour, the difference is obvious.
100 dollar front page is actually easy to see the authenticity, because there are many miniature printed words, which can be seen with a magnifying glass (the photo was taken by my mobile phone, magnified 5 times, with a resolution of 1080P. Baidu knows that the size of uploaded photos is limited, so it is impossible to upload photos with higher resolution, so you should be able to see them clearly just by looking.
1, like the United States of America on the collar? Fake. For technical reasons, this is rare.
You can also see a red thing in the picture above. This is fiber silk, which comes in red and blue colors. It is mixed in the pulp when making paper, so the position and shape are not fixed, and each picture is different. Some float on paper, and some are mixed in banknote paper, which can be picked out with sharp tools. This is a very old anti-counterfeiting method. From 1876, it is used for US dollar bills. However, until today, you can't find a fake, or it is printed on a painting, and you can't pick it out with a needle.
2. There are a bunch of American 100 micro-printed characters in the lower left corner.
Fake ones are either few in number and low in density, or a bunch of black spots.
The last two photos were taken by forcing the flash on. Do you see the reflection? I believe that people who like the collection of banknotes in the Republic of China should be familiar with the method of making old banknotes in your photos.
Your signature is the signature of the home page of 1996. Although the year of the banknote in the photo is not clear, it can basically be seen that the year starts with 2, not 1. After 1996, the big head is 100. Because the official changed the face signature, these two signatures only appeared in the 1996 version.