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# AWS::EC2::VPNConnection Phase1IntegrityAlgorithmsRequestListValue

Specifies the integrity algorithm for the VPN tunnel for phase 1 IKE negotiations.
## Syntax

To declare this entity in your CloudFormation template, use the following syntax:
### JSON

```
{
 "[Value](#cfn-ec2-vpnconnection-phase1integrityalgorithmsrequestlistvalue-value)" : {{String}}
}
```
### YAML

```
 [Value](#cfn-ec2-vpnconnection-phase1integrityalgorithmsrequestlistvalue-value): {{String}}
```
## Properties

`Value` 
The value for the integrity algorithm. 
*Required*: No 
*Type*: String 
*Allowed values*: `SHA1 | SHA2-256 | SHA2-384 | SHA2-512` 
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