**2.4 Injection's result**

The standard IPv4 header size with options and fields with padding is 320 bits. Two different options need to be considered:

1.IPv4 is a carrier and is responsible for packet addressing. Due to manipulation, 182 bits can be used, which is 56.88% of the total number of bits. This volume allows you to insert 22 symbols from 8 bits in ASCII encoding into the header.

**79**

**Figure 2.**

*Header format of IPv6.*

*Analysis of Network Protocols: The Ability of Concealing the Information*

the other 8 bits of the transmitted information.

The header's format of IPv6 is presented in **Figure 2**.

You can change the value of the "Flow Label" field.

This manipulation cannot be detected by the packet sniffer.

So after calculations we have got a value up to 4 bits. This remainder is part of

2.IPv4 is a passenger, it's an IPv4 encapsulated header in other headers, such as IPv6 or GRE. In this case, the method for implementing the target address can be used. As a result, handling bits 214, 66% of the total number of bits can be used. This volume allows you to implement a 26-character header with 8 bits in ASCII encoding. Thus, after calculations, a value of 6 bits is obtained. The treated residue was included in an additional 8 bits of the transmitted symbol.

You can change the "Traffic Class" value arbitrarily. This manipulation cannot

It is possible to increase the size of this field when adding data to the end of the original IP packet, like IPv4. This modification cannot be detected by the

*DOI: http://dx.doi.org/10.5772/intechopen.88098*

**2.5 IPv6**

*2.5.1 Header of IPv6*

1. "Traffic Class" field

be detected by analysis.

2. "Flow description" field

3. "Load Length" field

packet sniffer.

So after calculations we have got a value up to 4 bits. This remainder is part of the other 8 bits of the transmitted information.

2.IPv4 is a passenger, it's an IPv4 encapsulated header in other headers, such as IPv6 or GRE. In this case, the method for implementing the target address can be used. As a result, handling bits 214, 66% of the total number of bits can be used. This volume allows you to implement a 26-character header with 8 bits in ASCII encoding. Thus, after calculations, a value of 6 bits is obtained. The treated residue was included in an additional 8 bits of the transmitted symbol.
