| CPC H04L 9/0822 (2013.01) [H03M 7/6064 (2013.01); H04L 9/0825 (2013.01)] | 20 Claims |

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1. A method, comprising:
receiving, by a server node, a first notification indicating that a first message received by a first node of a cluster of nodes is not a redundant message and cannot be stored by a data store of the nodes, wherein the nodes are managed by the server node;
determining to invoke a compression process used to compress message identifiers stored in the first node;
receiving a first public key associated with the first node;
generating a compression key;
generating, responsive to determining to invoke the compression process used to compress the message identifiers stored in the first node, a first encrypted compression key by encrypting the compression key with the first public key;
sending, to the first node, the first encrypted compression key; and
receiving, from the first node, a second notification of storing, in a compressed form using a key decrypted from the first encrypted compression key, at least one message identifier in a data store of the first node.
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