I have a small number of employees who use a company computer but these people aren't very tech savvy. They use an email client and a messaging client.

I'm pretty sure they wouldn't click on .exe or .zip file in an email without thinking, and I know that's one area of concern.

However, I'm thinking about images. In fact, regardless of how capable a person is with technology I believe that attaching things (code or anything else) to an image can be a security risk.

What can be attached to images to harm another?

I believe that images can pose a security risk as they 'automatically execute' or something.

There are so many ways that images can be received by a computer (including phone or tablet of course):

- email
- iMessage (or any other messaging app)
- someone right-clicking and saving an image from a web page
- just viewing a web page of course downloads the image to cache

What precautions do I need to take regarding the above four things? Can someone just attach some code to an image and it execute?

What do I need to do to prevent images being used against my computers?

I'm guessing you couldn't just attach code to an image and iMessage someone's iPhone. What about Android?

I have a small number of employees who use a company computer but these people aren't very tech-savvy. They use an email client and a messaging client.

I'm pretty sure they wouldn't click on a .exe or .zip file in an email without thinking, and I know that's one area of concern.

However, I'm thinking about images. In fact, regardless of how capable a person is with technology, I believe that attaching things (code or anything else) to an image can be a security risk.

What can be attached to images to harm another?

I believe that images can pose a security risk as they 'automatically execute' or something.

There are so many ways that images can be received by a computer (or a phone or tablet, of course):

• email
• iMessage (or any other messaging app)
• someone right-clicking and saving an image from a web page
• just viewing a web page of course downloads the image to cache

What precautions do I need to take regarding the above four things? Can someone just attach some code to an image and it execute?

What do I need to do to prevent images being used against my computers?

I'm guessing you couldn't just attach code to an image and iMessage someone's iPhone. What about Android?