Implementing PCI-DSS Compliant Call Recording Storage in Genesys Cloud by Routing Audio Files to Encrypted AWS S3 Buckets with Object Lock Retention Policies

How-To-Articles
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Implementing PCI-DSS Compliant Call Recording Storage in Genesys Cloud by Routing Audio Files to Encrypted AWS S3 Buckets with Object Lock Retention Policies

What This Guide Covers

This guide details the configuration of the Genesys Cloud Recording Archive integration to ingest call recordings into an AWS S3 bucket configured with SSE-KMS encryption and S3 Object Lock in Compliance mode. The result is a PCI-DSS compliant storage pipeline where audio data is encrypted in transit via TLS 1.2, encrypted at rest using a Customer Managed Key, and protected against deletion or modification for a defined retention period mandated by your audit scope.

Prerequisites, Roles & Licensing

  • Genesys Cloud Licensing: CX 1, CX 2, or CX 3 license tier. The Recordings feature must be enabled.
  • Genesys Cloud Permissions:
    • Recording Archive > Edit
    • Integrations > Edit
    • Recording Policies > Edit
  • AWS Permissions:
    • IAM > CreateAccessKey, IAM > AttachUserPolicy
    • S3 > CreateBucket, S3 > PutBucketObjectLockConfiguration
    • KMS > CreateKey, KMS > PutKeyPolicy
  • External Dependencies:
    • AWS Account with S3 Object Lock enabled (requires bucket creation with Object Lock enabled simultaneously; cannot be added retroactively).
    • KMS Customer Managed Key (CMK) with a defined key policy.

The Implementation Deep-Dive

1. AWS S3 Bucket Architecture with Object Lock Compliance Mode

PCI-DSS Requirement 3.3 mandates that stored cardholder data is protected against deletion or modification. In the context of call recordings containing PAN (Primary Account Number) or CVV data, this requires Write-Once-Read-Many (WORM) capabilities. S3 Object Lock provides this, but the configuration mode determines the security boundary.

Create the S3 bucket with Versioning and Object Lock enabled. You must select Compliance Mode.

The Trap: Governance Mode is Insufficient for PCI.
S3 Object Lock offers two modes: Governance and Compliance. Governance mode allows IAM users with the s3:BypassGovernanceRetention permission to override retention periods and delete objects. Compliance mode prevents deletion or overwriting even by AWS root account users until the retention period expires. If your auditor reviews the environment and sees Governance mode, they will flag this as a vulnerability because a privileged IAM user could theoretically remove evidence. You must use Compliance mode to satisfy the immutability requirement.

Configure the bucket with the following settings:

  • Versioning: Enabled. Object Lock requires versioning.
  • Default Retention: Set to WORM with the minimum retention period required by PCI-DSS (typically 12 months). This applies to all objects uploaded without an explicit retention header.
  • Encryption: Default encryption set to SSE-KMS using your Customer Managed Key.

The IAM policy for the Genesys integration user must grant precise permissions. Do not use s3:*.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowGenesysArchiveUpload",
      "Effect": "Allow",
      "Action": [
        "s3:PutObject",
        "s3:PutObjectAcl",
        "s3:GetBucketLocation"
      ],
      "Resource": [
        "arn:aws:s3:::genesys-pci-recordings",
        "arn:aws:s3:::genesys-pci-recordings/*"
      ]
    },
    {
      "Sid": "AllowKMSDataKeyGeneration",
      "Effect": "Allow",
      "Action": [
        "kms:GenerateDataKey",
        "kms:Decrypt"
      ],
      "Resource": "arn:aws:kms:us-east-1:123456789012:key/abcd1234-5678-90ab-cdef-EXAMPLE11111"
    },
    {
      "Sid": "DenyInsecureTransport",
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:*",
      "Resource": "arn:aws:s3:::genesys-pci-recordings/*",
      "Condition": {
        "Bool": {
          "aws:SecureTransport": "false"
        }
      }
    }
  ]
}

The DenyInsecureTransport block enforces PCI-DSS Requirement 4.1 by rejecting any non-TLS connection to the bucket. Genesys Cloud uses TLS 1.2 by default, which satisfies this condition.

2. KMS Key Policy and Access Control

The Customer Managed Key (CMK) must restrict usage to the specific IAM entity used by Genesys. A broad key policy allows any IAM user in the account to decrypt recordings, violating PCI-DSS Requirement 7.2 (Least Privilege).

Update the KMS key policy to include the Genesys IAM user ARN.

{
  "Version": "2012-10-17",
  "Id": "key-policy-1",
  "Statement": [
    {
      "Sid": "Enable IAM User Permissions",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::123456789012:root"
      },
      "Action": "kms:*",
      "Resource": "*"
    },
    {
      "Sid": "AllowGenesysArchiveAccess",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::123456789012:user/genesys-archive-integration"
      },
      "Action": [
        "kms:GenerateDataKey",
        "kms:Decrypt"
      ],
      "Resource": "*"
    }
  ]
}

The Trap: Key Rotation Misconfiguration.
PCI-DSS Requirement 3.6.1 requires cryptographic keys used for encryption to be protected and rotated. If you configure automatic key rotation in KMS, AWS generates a new key material version annually. S3 objects retain the key ID at the time of upload. Decryption works transparently via the key alias. The trap occurs if you rotate the key and update the Genesys Archive configuration to point to the new key ID while old recordings remain encrypted with the old key ID. Genesys does not re-encrypt existing objects. If you restrict the key policy to only allow the new key version, you lock yourself out of decrypting historical recordings. Ensure the key policy grants access to the key ARN, not a specific version, and allow KMS to handle versioning transparently.

3. Genesys Cloud Recording Archive Configuration

Navigate to Admin > Integrations > Recording Archive. Click Add Archive and select AWS S3.

Configure the following fields:

  • Name: PCI_Compliant_S3_Archive
  • Region: Select the region matching your S3 bucket exactly. A region mismatch causes signature calculation failures.
  • Bucket: genesys-pci-recordings
  • Path: /recordings/{year}/{month}/{day}/{recordingId}.wav
  • Credentials: Enter the Access Key ID and Secret Access Key for the genesys-archive-integration IAM user.

The Trap: Path Variable Formatting and S3 Key Limits.
The path variable defines the S3 object key. S3 object keys have a maximum length of 1,024 bytes. If you construct a path like /recordings/{year}/{month}/{day}/{accountId}/{organizationId}/{siteId}/{userId}/{recordingId}.wav, the resulting key may exceed limits or hit S3 prefix throttling limits. Additionally, ensure the path does not contain characters that violate S3 naming conventions. Genesys encodes special characters, but overly complex paths increase the risk of 400 Bad Request errors during upload. Use a flat structure with date partitioning as shown above. This balances performance with auditability.

Test the connection using the Test Connection button. This triggers a PutObject request to validate credentials, bucket access, and encryption settings. If the test fails with a SignatureDoesNotMatch error, verify the region. If it fails with AccessDenied, verify the IAM policy and KMS key policy.

After saving, the archive enters an Active state. You can verify status via the API.

GET /api/v2/recording/archives/{archiveId}
Authorization: Bearer <token>

Response payload validation:

{
  "id": "archive-uuid",
  "name": "PCI_Compliant_S3_Archive",
  "type": "AWS_S3",
  "region": "us-east-1",
  "bucket": "genesys-pci-recordings",
  "path": "/recordings/{year}/{month}/{day}/{recordingId}.wav",
  "state": "ACTIVE",
  "lastSuccess": 1698765432000,
  "lastError": null
}

4. Recording Policy Enforcement and Archive Assignment

Recordings are not automatically routed to the new archive. You must update the Recording Policy to assign the S3 archive. PCI-DSS compliance requires that all calls handling cardholder data are recorded and archived.

Navigate to Admin > Recordings > Policies. Edit the policy associated with PCI-scoped queues or IVR flows.

In the Archives section, add the PCI_Compliant_S3_Archive. Set the priority to 1.

The Trap: Default Archive Fallback and Data Leakage.
If you add the S3 archive but do not disable the default Genesys Cloud archive, recordings are written to both locations. The default Genesys Cloud archive stores data in Genesys infrastructure. Unless you have explicitly scoped out Genesys Cloud storage in your PCI audit and verified their SOC 2 / PCI DSS compliance, writing data to the default archive expands your PCI scope. If you require data to reside exclusively in your S3 bucket to reduce scope, you must ensure the policy routes only to the S3 archive. Verify this by checking the policy configuration. If multiple archives are present, Genesys writes to all of them. There is no “exclusive” flag. To exclude Genesys storage, remove the default archive from the policy entirely.

For granular control, use Architect to set recording properties based on flow logic. If your IVR collects PAN data after a specific node, you can set the archive dynamically.

# Architect Set Recording Properties block
recordingArchiveIds: ["archive-uuid"]
recordingEnabled: true

This ensures that only segments containing sensitive data are routed to the high-security archive, or that the correct retention metadata is applied. However, for full PCI compliance, auditors often require that the entire interaction is preserved to maintain context. Verify your QSA (Qualified Security Assessor) requirements regarding partial recording segmentation.

5. Validation and Audit Trail Configuration

PCI-DSS Requirement 10 requires audit trails to detect direct access to cardholder data. You must enable S3 Server Access Logging and AWS CloudTrail.

Enable S3 Server Access Logging on the bucket, pointing to a separate logging bucket with its own Object Lock retention. This captures every PutObject request from Genesys, including the source IP, user agent, and timestamp.

Enable AWS CloudTrail for the KMS key to capture key usage events. This provides a trail of who generated data keys for encryption.

The Trap: Log Integrity and Retention Mismatch.
If the audit logs are stored in a bucket without Object Lock, an attacker or insider threat could delete the logs to cover their tracks. The logging bucket must also have Object Lock in Compliance mode with a retention period equal to or greater than the recording bucket. Additionally, ensure the logging bucket policy denies all write access except for the S3 logging service principal (s3.amazonaws.com).

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowS3LoggingWrite",
      "Effect": "Allow",
      "Principal": {
        "Service": "s3.amazonaws.com"
      },
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::s3-audit-logs/*",
      "Condition": {
        "StringEquals": {
          "aws:SourceAccount": "123456789012"
        },
        "ArnLike": {
          "aws:SourceArn": "arn:aws:s3:::genesys-pci-recordings"
        }
      }
    }
  ]
}

Validation, Edge Cases & Troubleshooting

Edge Case 1: Object Lock Retention Period Mismatch

The Failure Condition: Genesys Cloud uploads a recording, but the auditor finds that the S3 object retention period is shorter than the required 12 months.
The Root Cause: The S3 bucket default retention was set incorrectly, or the Genesys integration user lacks permission to set retention headers and the bucket default is not applied. S3 Object Lock applies the default retention only if the s3:PutObjectRetention permission is not granted and the upload does not specify a retention header. Genesys Cloud does not send retention headers by default.
The Solution: Verify the bucket default retention configuration in the S3 console. Ensure Object Lock > Default Retention is set to WORM with 12 months. Confirm the IAM policy does not grant s3:PutObjectRetention to the Genesys user, as this would allow Genesys to override the default if the feature were supported, which could lead to inconsistent retention.

Edge Case 2: Credential Rotation and Archive Disruption

The Failure Condition: The Recording Archive state flips to FAILED with AccessDenied errors immediately after IAM credential rotation.
The Root Cause: S3 rejects requests with expired or inactive access keys. Genesys Cloud caches credentials and retries failed uploads. If the retry occurs after the old key is disabled, uploads fail.
The Solution: Genesys Cloud Recording Archive does not support automatic IAM credential rotation via OIDC. You must rotate keys via the Genesys API. Generate a new access key in AWS, then update the archive.

PUT /api/v2/recording/archives/{archiveId}
Authorization: Bearer <token>
Content-Type: application/json

{
  "credentials": {
    "accessKey": "NEW_ACCESS_KEY_ID",
    "secretKey": "NEW_SECRET_ACCESS_KEY"
  }
}

Schedule rotation during low-volume windows. The update is immediate. Any recordings in the internal Genesys queue will be retried with the new credentials. If a recording fails permanently due to transient errors during the switch, check the Recording Archive error logs for specific object IDs and manually re-trigger archival if supported, or ensure the recording remains in Genesys storage until the archive recovers.

Edge Case 3: Large Recording Files and S3 Multipart Uploads

The Failure Condition: Recordings exceeding 100MB fail to upload, resulting in RequestTimeout errors in the Genesys archive logs.
The Root Cause: Genesys Cloud uses multipart uploads for large files. If the network latency between Genesys Cloud and AWS S3 is high, or if the S3 bucket policy imposes restrictions on multipart upload parts (e.g., s3:AbortMultipartUpload denied), the upload fails. S3 automatically aborts incomplete multipart uploads after 7 days, but Genesys may timeout earlier.
The Solution: Ensure the IAM policy grants s3:AbortMultipartUpload to allow Genesys to clean up failed uploads. Verify that your corporate firewall or proxy does not block HTTPS traffic to s3.{region}.amazonaws.com on port 443. If using a proxy, ensure it supports chunked transfer encoding and does not impose low timeouts on large payloads. Monitor the lastSuccess timestamp in the archive API response to detect prolonged failures.

Official References